艾奥瓦州 (Chinese Wikipedia)

Martin JA, Hamilton BE, Osterman MJ, Curtin SC, Mathews TJ. National Vital Statistics Reports—Births: Final Data for 2013 (PDF) (报告) 64. U.S. Department of Health and Human Services: 35–6. 2015-01-15 [2019-02-03]. （原始内容 (PDF)存档于2017-09-11）. |issue=被忽略 (帮助)
Hamilton BE, Martin JA, Osterman MJ, Curtin SC, Mathews TJ. National Vital Statistics Reports—Births: Final Data for 2014 (PDF) (报告) 64. U.S. Department of Health and Human Services: 35–6. 2015-12-23 [2019-02-03]. （原始内容 (PDF)存档于2017-02-14）. |issue=被忽略 (帮助)
Martin JA, Hamilton BE, Osterman MJ, Driscoll AK. National Vital Statistics Reports—Births: Final Data for 2015 (PDF) (报告) 66. U.S. Department of Health and Human Services: 38, 40. 2017-01-05 [2019-02-03]. （原始内容 (PDF)存档于2017-08-31）. |issue=被忽略 (帮助)
Martin JA, Hamilton BE, Osterman MJ, Driscoll AK, Drake P. National Vital Statistics Reports—Births: Final Data 2016 (PDF) (报告) 67. U.S. Department of Health and Human Services: 26. 2018-01-31 [2019-02-03]. （原始内容 (PDF)存档于2018-06-03）. |issue=被忽略 (帮助)
Martin JA, Hamilton BE, Osterman MJ, Driscoll AK, Drake P. National Vital Statistics Reports—Births, by race and origin of mother: United States, each state and territory, 2017 (PDF) (报告) 67: 20. 2018-11-07 [2021-12-09]. （原始内容 (PDF)存档于2019-02-01）. |number=被忽略 (帮助)
Martin, Joyce A.; Hamilton, Brady E.; Osterman, Michelle J.K.; Driscoll, Anne K. Births: Final Data for 2018 (PDF) (报告). 2019-11-27 [2021-12-09]. （原始内容 (PDF)存档于2019-11-28）.
Data (PDF). Cdc.gov. [2021-03-29]. （原始内容 (PDF)存档于2021-03-24）.

census.gov

United States Census Bureau. Metropolitan and Micropolitan Statistical Areas Population Totals: 2010–2018. [2019-06-07]. （原始内容存档于2019-06-02）.
"1860 Census: Population of the United States" （页面存档备份，存于互联网档案馆）. United States Census Bureau. Retrieved October 7, 2019.
Bureau, US Census. 1880 Census: Volume 1. Statistics of the Population. The United States Census Bureau. [2020-04-14]. （原始内容存档于2020-06-11）.
Historical Population Change Data (1910–2020). Census.gov. United States Census Bureau. [2021-12-09]. （原始内容存档于2021-04-29）.
U.S. Census website. [2020-01-18]. （原始内容存档于1996-12-27）.
2019 American Community Survey—Demographic and Housing Estimates. United States Census Bureau. [2021-04-28]. （原始内容存档于1996-12-27）.
Historical Census Statistics on Population Totals By Race, 1790 to 1990, and By Hispanic Origin, 1970 to 1990, For The United States, Regions, Divisions, and States. Census.gov. [2014-07-26]. （原始内容存档于2008-07-25）.
2010 Census Data. 2010 Census Data. Census.gov. [2014-07-26]. （原始内容存档于2017-05-22）.
Race and Ethnicity in the United States: 2010 Census and 2020 Census. U.S. Census Bureau. 2021-08-12 [2021-08-12]. （原始内容存档于2021-08-15）.
QuickFacts: Iowa. Census.gov. U.S. Census Bureau. [2020-01-01]. （原始内容存档于2019-11-10）.
2000 U.S. Census: Census.gov （页面存档备份，存于互联网档案馆）

factfinder.census.gov

Annual Estimates of the Resident Population: April 1, 2010 to July 1, 2018 - 2018 Population Estimates. US Census Bureau. US Census Bureau. [2019-09-17]. （原始内容存档于2020-02-13）.
2016 American Community Survey—Demographic and Housing Estimates. United States Census Bureau. [2018-11-21]. （原始内容存档于2020-02-13）.
2016 American Community Survey—Selected Social Characteristics. United States Census Bureau. [2018-11-21]. （原始内容存档于2020-02-13）.

www2.census.gov

Resident Population for the 50 States, the District of Columbia, and Puerto Rico: 2020 Census (PDF). Census.gov. 2021-04-27 [2021-12-02]. （原始内容存档 (PDF)于2021-04-26）.
Numeric and Percent Change in Resident Population (PDF). 2020 Census Apportionment Results. United States Census Bureau, Population Division. 2021-04-26 [2021-04-27]. （原始内容 (PDF)存档于2021-04-26）.

quickfacts.census.gov

U.S. Census quickfacts. United States Census Bureau. [2015-04-02]. （原始内容存档于2010-05-27）.

data.census.gov

Explore Census Data. data.census.gov. [2021-05-03]. （原始内容存档于2021-05-03）.

censusviewer.com

Population of Iowa: Census 2010 and 2000 Interactive Map, Demographics, Statistics, Quick Facts. Censusviewer.com. [2014-07-26]. （原始内容存档于2016-03-04）.

city-data.com

Iowa-Languages. City Data. [2010-07-28]. （原始内容存档于2010-11-01）.

cityofcarterlake.com

About Carter Lake. [2020-10-07]. （原始内容存档于2020-10-09）.

cityofkeokuk.org

Keokuk Comprehensive Plan 2018 (PDF) (报告). June 2018 [2020-04-06]. （原始内容 (PDF)存档于2021-02-20）.

climate-data.org

en.climate-data.org

Climate Iowa: Temperature, climate graph, Climate table for Iowa - Climate-Data.org. en.climate-data.org. [2020-04-06]. （原始内容存档于2019-04-24）.

cnbc.com

America's Top States for Business in 2010. CNBC. [2011-05-09]. （原始内容存档于2011-12-26）.

cuny.edu

gc.cuny.edu

American Religious Identification Survey 2001 (PDF). The Graduate Center of the City University of New York. [2012-01-04]. （原始内容 (PDF)存档于2012-05-16）.

currentresults.com

Average Annual Snowfall Totals in Iowa - Current Results. Currentresults.com. [2020-04-06]. （原始内容存档于2020-02-21）.

desmoinesregister.com

Living with Hogs in Rural Iowa. Iowa Ag Review. Iowa State University. 2003 [2009-11-25]. （原始内容存档于2022-05-10）.
Eller, Donnelle. Looking for greater profits, more Iowa farmers move to organic corn, soybeans. The Des Moines Register. 2017-11-03 [2019-01-21]. （原始内容存档于2021-02-20）.

doi.org

Lendt, David L. "Iowa and the Copperhead Movement." The Annals of Iowa 40 (1970), 412-427. Available at: https://doi.org/10.17077/0003-4827.7965 （页面存档备份，存于互联网档案馆） Hosted by Iowa Research Online
Donovan, Todd; Redlawsk, David; Tolbert, Caroline. The 2012 Iowa Republican Caucus and Its Effects on the Presidential Nomination Contest. Presidential Studies Quarterly. September 2014, 44 (3): 447–466. doi:10.1111/psq.12132.
Donovan, Todd; Hunsaker, Rob. Beyond expectations: effects of early elections in U.S. presidential nomination contests. PS: Political Science & Politics. January 2009, 42 (1): 45–52 [2016-01-30]. S2CID 42839320. doi:10.1017/S1049096509090040. （原始内容存档于2016-07-15）.

dri.edu

wrcc.dri.edu

Average Annual Precipitation Iowa, 1961–1990 (GIF File) （页面存档备份，存于互联网档案馆）—Christopher Daly, Jenny Weisburg

educateiowa.gov

About the Iowa Education System. Iowa Department of Education. [2019-11-03]. （原始内容存档于2019-11-03）.

eia.gov

Electric Power Monthly. U.S. Department of Energy, Energy Information Administration. [2020-06-02]. （原始内容存档于2018-02-06）.

gazetteonline.com

Heldt, Diane. Report: Many Iowa coal plants among nation's oldest. Cedar Rapids Gazette. 2009-11-24 [2009-11-25]. （原始内容存档于2012-12-08）.
Love, Orlan. Heavy use draining aquifer. Cedar Rapids Gazette. 2009-12-06 [2009-12-20]. （原始内容存档于2009-12-09）.
Ethanol mandate wouldn't help prices. Cedar Rapids Gazette. 2010-02-26 [2010-04-04]. （原始内容存档于2012-12-08）.

harvard.edu

scholar.harvard.edu

Goldin C, Katz LF. Why the United States Led in Education: Lessons from Secondary School Expansion, 1910 to 1940 （页面存档备份，存于互联网档案馆）. In: Eltis D, Lewis F, Sokoloff K Human Capital and Institutions. Cambridge University Press ; 2009.

iastate.edu

energy.iastate.edu

Wind Energy in Iowa. Iowa Energy Center. [2009-08-08]. （原始内容存档于2009-06-21）.

recap.iastate.edu

Iowa State University. Gross domestic product by sector and state. Regional Capacity Analysis Program. Retrieved on: April 26, 2008. 互联网档案馆的存檔，存档日期2008-10-09.

www2.econ.iastate.edu

Swenson, David, The Economic Impact of the Iowa Caucus: Gauging the Worth of Its First‐in‐the‐Nation Position? (PDF), April 2008 [2020-04-22], （原始内容 (PDF)存档于2020-04-04）

insurancejournal.com

N.H. Receives Lowest Crime Ranking; Nevada Ranks as Worst State. Insurance Journal. Wells Publishing. 2009-03-25 [2009-08-08]. （原始内容存档于2012-03-15）.

iowa.gov

publications.iowa.gov

Schwieder, Dorothy. History of Iowa. Iowa State University. [2009-06-06]. （原始内容存档于2009-09-03）.
Schwieder, Dorothy. History of Iowa. publications.iowa.gov. [2020-04-20]. （原始内容存档于2009-09-03）.

iowacaucus.com

James Q. Lynch. What happens at a caucus?. iowacaucus.com. 2007-11-19. （原始内容存档于2007-12-22）.

iowadnr.com

Odessa. Iowa Department of Natural Resources. [2009-06-06]. （原始内容存档于2008-09-21）.

iowadnr.gov

Wetlands. Iowadnr.gov. [2020-04-07]. （原始内容存档于2020-04-07）.
Iowa's Threatened and Endangered Species Program, Iowadnr.gov 互联网档案馆的存檔，存档日期2015-09-24.

iowalifechanging.com

Major Industries in Iowa (PDF). Iowa Department of Economic Development. [2009-06-29]. （原始内容 (PDF)存档于2005-05-20）.

iowaorganic.org

Iowa Organic Association. [2019-04-16]. （原始内容存档于2019-04-16）.

iowapbs.org

Types of Business and Industry. Iowa PBS. 2016-07-25 [2020-04-15]. （原始内容存档于2020-06-11）.
Early Industry. Iowa PBS. 2016-07-25 [2020-04-15]. （原始内容存档于2020-06-11）.

iowapublicradio.org

Boden, Sarah. Lawmakers Scrounge Up Bus Money for Rural School Districts. Iowa Public Radio. 2015-02-03 [2018-06-18]. （原始内容存档于2018-06-17）.

iowaregents.edu

What is the Board of Regents?. Iowaregents.edu. 2016-06-22 [2020-04-15]. （原始内容存档于2020-06-11）.

iowasisterstates.org

Iowa Sister States. Iowa Sister States. [2023-08-02]. （原始内容存档于2023-08-02）（英语）.

iowaworkforcedevelopment.gov

Iowa's Unemployment Rate Falls To 4.0 Percent In September. 2021-10-22 [2021-12-07]. （原始内容存档于2021-11-08）.

iptv.org

Iowa Works to Reduce Run-off Polluting the Gulf of Mexico. The Iowa Journal. Iowa Public Television. 2009-09-17 [2009-11-25]. （原始内容存档于2009-11-06）.

iu.edu

carnegieclassifications.iu.edu

Carnegie Classifications | Standard Listings. carnegieclassifications.iu.edu. [2020-04-21]. （原始内容存档于2020-06-11）.

jackson.ia.us

co.jackson.ia.us

Jackson County, Iowa History Information. Jackson County, Iowa. [2019-11-03]. （原始内容存档于2019-11-04）.

loc.gov

guides.loc.gov

Drexler, Ken. Research Guides: Indian Removal Act: Primary Documents in American History: Introduction. guides.loc.gov. [2020-04-14]. （原始内容存档于2020-04-05）.

mac.com

homepage.mac.com

Morrison, Jeff. Forty-Thirty-five or fight? Sullivan's Line, the Honey War, and latitudinal estimations. 2005-01-13 [2009-08-09]. （原始内容存档于2007-01-01）.

mofcom.gov.cn

chicago.mofcom.gov.cn

艾奥瓦州概况. chicago.mofcom.gov.cn. 中国商务部. [2023-06-04]. （原始内容存档于2023-06-05）.

napoleon-series.org

Treaty of San Ildefonso 1800. Napoleon-series.org. [2020-04-14]. （原始内容存档于2020-11-06）.

nea.org

Rankings And Estimates Report 2018 (PDF). National Education Association. [2019-11-03]. （原始内容 (PDF)存档于2019-11-12）.

noaa.gov

srh.noaa.gov

US Thunderstorm distribution. src.noaa.gov. Retrieved February 13, 2008. 互联网档案馆的存檔，存档日期2006-10-15.

crh.noaa.gov

Des Moines, IA. noaa.gov. [2015-02-18]. （原始内容存档于2014-08-21）.

northeastiowarcd.org

Northeast Iowa Local Foods Expansion Plan (PDF), Northeast Iowa Resource Conservation and Development, [2019-01-21], （原始内容 (PDF)存档于2019-01-21）
Grow The Local Food System, Northeast Iowa Resource Conservation and Development, [2019-01-21], （原始内容存档于2019-01-22）

pewforum.org

Religious composition of adults in Iowa. Pew Research Center. [2019-08-18]. （原始内容存档于2017-08-01）.

repec.org

ideas.repec.org

Swenson, David A; Eathington, Liesl. Multiple Measures of the Role of Agriculture in Iowa's Economy. Iowa State University, Department of Economics. Staff General Research Papers, number 10180. 2002-12-01 [2014-07-26]. （原始内容存档于2014-07-15）.

semanticscholar.org

api.semanticscholar.org

Donovan, Todd; Hunsaker, Rob. Beyond expectations: effects of early elections in U.S. presidential nomination contests. PS: Political Science & Politics. January 2009, 42 (1): 45–52 [2016-01-30]. S2CID 42839320. doi:10.1017/S1049096509090040. （原始内容存档于2016-07-15）.

state.ia.us

iwin.iwd.state.ia.us

Population Trends: The Changing Face of Iowa, State.ia.us 互联网档案馆的存檔，存档日期2006-10-06.

legis.state.ia.us

Preamble to the 1857 Constitution of the State of Iowa. [2009-08-09]. （原始内容存档于2009-08-02）.

statelibraryofiowa.org

Iowa Quick Facts—State Data Center. Statelibraryofiowa.org. 2010-06-28 [2010-07-31]. （原始内容存档于2010-11-04）.

telegraphherald.com

Bellevue school board sets referendum for $16 million bond issuance. Telegraph Herald. [2019-11-03]. （原始内容存档于2019-11-03）.

thearda.com

The Association of Religion Data Archives | State Membership Report. thearda.com. [2013-11-12]. （原始内容存档于2013-11-12）.

timesrepublican.com

Iowa officials tout credit rating, argue it shows state's finances are strong, Associated Press July 3, 2009, Timesrepublican.com 互联网档案馆的存檔，存档日期2010-09-07.

traveliowa.com

State Symbols. Iowa Department of Economic Development. [2011-09-09]. （原始内容存档于2011-09-02）.

tripod.com

eightiesclub.tripod.com

The Midwest Farm Crisis of the 1980s, Tripod.com 互联网档案馆的存檔，存档日期2008-07-06.

tysonfoods.com

Our story-locations. Tysonfoods.com. [2014-07-16]. （原始内容存档于2014-07-04）.

uiowa.edu

igsb.uiowa.edu

Prior, Jean Cutler. Geology of Iowa: Iowa's Earth History Shaped by Ice, Wind, Rivers, and Ancient Seas. Adapted from Iowa Geology 2007, Iowa Department of Natural Resources. Iowa Department of Natural Resources Geological Survey. [2009-08-09]. （原始内容存档于2009-04-16）.
Prior, Jean C. Landforms of Iowa. University of Iowa Press, Iowa City. 1991. （原始内容存档于2009-03-02）.
Iowa DNR: Iowa's Statewide Land Cover Inventory, Uiowa.edu 互联网档案馆的存檔，存档日期2009-05-02.

uiowapress.org

Peterson, Cynthia L. Historical Tribes and Early Forts. William E. Whittaker (编). Frontier Forts of Iowa: Indians, Traders, and Soldiers, 1682–1862. Iowa City: University of Iowa Press. 2009: 12–29 [2021-12-02]. ISBN 978-1-58729-831-8. （原始内容存档于2016-08-17）.
Carlson, Gayle F. Fort Atkinson, Nebraska, 1820–1827, and Other Missouri River Sites. William E. Whittaker (编). Frontier Forts of Iowa: Indians, Traders, and Soldiers, 1682–1862. Iowa City: University of Iowa Press. 2009: 104–120 [2021-12-02]. ISBN 978-1-58729-831-8. （原始内容存档于2016-08-17）.
McKusick, Marshall B. Fort Madison, 1808–1813. William E. Whittaker (编). Frontier Forts of Iowa: Indians, Traders, and Soldiers, 1682–1862. Iowa City: University of Iowa Press. 2009: 55–74 [2021-12-02]. ISBN 978-1-58729-831-8. （原始内容存档于2016-08-17）.

uni.edu

Landforms of Iowa (PDF). Uni.edu. [2020-04-07]. （原始内容 (PDF)存档于2012-07-31）.

usatoday.com

Munson, Kyle. Site of Iowa's coldest temp shivers with rest of state. USA TODAY. [2020-04-06]. （原始内容存档于2020-02-28）.

usda.gov

ers.usda.gov

USDA. Iowa State Fact Sheets. [2015-02-21]. （原始内容存档于2015-02-22）.

uselectionatlas.org

Leip, David. General Election Results – Iowa. United States Election Atlas. [2021-01-29]. （原始内容存档于2018-07-09）.

usgs.gov

pubs.usgs.gov

Geology of the Loess Hills, Iowa. United States Geological Survey. July 1999 [2008-03-26]. （原始内容存档于2008-03-28）.

ustravelweather.com

Iowa Weather-Iowa Weather Forecast-Iowa Climate. ustravelweather.com. [2011-02-17]. （原始内容存档于2011-01-31）.

weather.com

Average Weather for Des Moines, IA—Temperature and Precipitation, Weather.com, Retrieved 2009-01-07. Weather.com. [2010-07-31]. （原始内容存档于2010-12-03）.
Monthly Averages for Davenport, Iowa. Weather.com. [2008-11-01]. （原始内容存档于2008-10-08）.
Average Weather for Des Moines, IA—Temperature and Precipitation. Weather.com. [2012-02-18]. （原始内容存档于2012-10-24）.
Daily Averages for Keokuk, IA. weather.com. [2012-02-18]. （原始内容存档于2012-10-24）.
Average Weather for Mason City, IA—Temperature and Precipitation. Weather.com. [2012-02-18]. （原始内容存档于2012-10-24）.
Average Weather for Sioux City, IA—Temperature and Precipitation. Weather.com. [2012-02-18]. （原始内容存档于2012-10-24）.

web.archive.org

State Symbols. Iowa Department of Economic Development. [2011-09-09]. （原始内容存档于2011-09-02）.
艾奥瓦州概况. chicago.mofcom.gov.cn. 中国商务部. [2023-06-04]. （原始内容存档于2023-06-05）.
Resident Population for the 50 States, the District of Columbia, and Puerto Rico: 2020 Census (PDF). Census.gov. 2021-04-27 [2021-12-02]. （原始内容存档 (PDF)于2021-04-26）.
United States Census Bureau. Metropolitan and Micropolitan Statistical Areas Population Totals: 2010–2018. [2019-06-07]. （原始内容存档于2019-06-02）.
N.H. Receives Lowest Crime Ranking; Nevada Ranks as Worst State. Insurance Journal. Wells Publishing. 2009-03-25 [2009-08-08]. （原始内容存档于2012-03-15）.
USDA. Iowa State Fact Sheets. [2015-02-21]. （原始内容存档于2015-02-22）.
Major Industries in Iowa (PDF). Iowa Department of Economic Development. [2009-06-29]. （原始内容 (PDF)存档于2005-05-20）.
Wind Energy in Iowa. Iowa Energy Center. [2009-08-08]. （原始内容存档于2009-06-21）.
Peterson, Cynthia L. Historical Tribes and Early Forts. William E. Whittaker (编). Frontier Forts of Iowa: Indians, Traders, and Soldiers, 1682–1862. Iowa City: University of Iowa Press. 2009: 12–29 [2021-12-02]. ISBN 978-1-58729-831-8. （原始内容存档于2016-08-17）.
Carlson, Gayle F. Fort Atkinson, Nebraska, 1820–1827, and Other Missouri River Sites. William E. Whittaker (编). Frontier Forts of Iowa: Indians, Traders, and Soldiers, 1682–1862. Iowa City: University of Iowa Press. 2009: 104–120 [2021-12-02]. ISBN 978-1-58729-831-8. （原始内容存档于2016-08-17）.
Treaty of San Ildefonso 1800. Napoleon-series.org. [2020-04-14]. （原始内容存档于2020-11-06）.
McKusick, Marshall B. Fort Madison, 1808–1813. William E. Whittaker (编). Frontier Forts of Iowa: Indians, Traders, and Soldiers, 1682–1862. Iowa City: University of Iowa Press. 2009: 55–74 [2021-12-02]. ISBN 978-1-58729-831-8. （原始内容存档于2016-08-17）.
Drexler, Ken. Research Guides: Indian Removal Act: Primary Documents in American History: Introduction. guides.loc.gov. [2020-04-14]. （原始内容存档于2020-04-05）.
Schwieder, Dorothy. History of Iowa. Iowa State University. [2009-06-06]. （原始内容存档于2009-09-03）.
Jackson County, Iowa History Information. Jackson County, Iowa. [2019-11-03]. （原始内容存档于2019-11-04）.
Lendt, David L. "Iowa and the Copperhead Movement." The Annals of Iowa 40 (1970), 412-427. Available at: https://doi.org/10.17077/0003-4827.7965 （页面存档备份，存于互联网档案馆） Hosted by Iowa Research Online
"1860 Census: Population of the United States" （页面存档备份，存于互联网档案馆）. United States Census Bureau. Retrieved October 7, 2019.
Bureau, US Census. 1880 Census: Volume 1. Statistics of the Population. The United States Census Bureau. [2020-04-14]. （原始内容存档于2020-06-11）.
Types of Business and Industry. Iowa PBS. 2016-07-25 [2020-04-15]. （原始内容存档于2020-06-11）.
Early Industry. Iowa PBS. 2016-07-25 [2020-04-15]. （原始内容存档于2020-06-11）.
Schwieder, Dorothy. History of Iowa. publications.iowa.gov. [2020-04-20]. （原始内容存档于2009-09-03）.
The Midwest Farm Crisis of the 1980s, Tripod.com 互联网档案馆的存檔，存档日期2008-07-06.
Population Trends: The Changing Face of Iowa, State.ia.us 互联网档案馆的存檔，存档日期2006-10-06.
Iowa Fast Facts and Trivia. 50states.com. [2013-02-24]. （原始内容存档于2013-01-28）.
About Carter Lake. [2020-10-07]. （原始内容存档于2020-10-09）.
Preamble to the 1857 Constitution of the State of Iowa. [2009-08-09]. （原始内容存档于2009-08-02）.
Morrison, Jeff. Forty-Thirty-five or fight? Sullivan's Line, the Honey War, and latitudinal estimations. 2005-01-13 [2009-08-09]. （原始内容存档于2007-01-01）.
Prior, Jean Cutler. Geology of Iowa: Iowa's Earth History Shaped by Ice, Wind, Rivers, and Ancient Seas. Adapted from Iowa Geology 2007, Iowa Department of Natural Resources. Iowa Department of Natural Resources Geological Survey. [2009-08-09]. （原始内容存档于2009-04-16）.
Prior, Jean C. Landforms of Iowa. University of Iowa Press, Iowa City. 1991. （原始内容存档于2009-03-02）.
Geology of the Loess Hills, Iowa. United States Geological Survey. July 1999 [2008-03-26]. （原始内容存档于2008-03-28）.
Landforms of Iowa (PDF). Uni.edu. [2020-04-07]. （原始内容 (PDF)存档于2012-07-31）.
Odessa. Iowa Department of Natural Resources. [2009-06-06]. （原始内容存档于2008-09-21）.
Wetlands. Iowadnr.gov. [2020-04-07]. （原始内容存档于2020-04-07）.
Iowa DNR: Iowa's Statewide Land Cover Inventory, Uiowa.edu 互联网档案馆的存檔，存档日期2009-05-02.
Central tall grasslands | Ecoregions | WWF. World Wildlife Fund. [2020-04-07]. （原始内容存档于2020-08-10）.
Iowa's Threatened and Endangered Species Program, Iowadnr.gov 互联网档案馆的存檔，存档日期2015-09-24.
Iowa Works to Reduce Run-off Polluting the Gulf of Mexico. The Iowa Journal. Iowa Public Television. 2009-09-17 [2009-11-25]. （原始内容存档于2009-11-06）.
Living with Hogs in Rural Iowa. Iowa Ag Review. Iowa State University. 2003 [2009-11-25]. （原始内容存档于2022-05-10）.
Love, Orlan. Heavy use draining aquifer. Cedar Rapids Gazette. 2009-12-06 [2009-12-20]. （原始内容存档于2009-12-09）.
Climate Iowa: Temperature, climate graph, Climate table for Iowa - Climate-Data.org. en.climate-data.org. [2020-04-06]. （原始内容存档于2019-04-24）.
US Thunderstorm distribution. src.noaa.gov. Retrieved February 13, 2008. 互联网档案馆的存檔，存档日期2006-10-15.
Average Annual Snowfall Totals in Iowa - Current Results. Currentresults.com. [2020-04-06]. （原始内容存档于2020-02-21）.
Des Moines, IA. noaa.gov. [2015-02-18]. （原始内容存档于2014-08-21）.
Keokuk Comprehensive Plan 2018 (PDF) (报告). June 2018 [2020-04-06]. （原始内容 (PDF)存档于2021-02-20）.
Munson, Kyle. Site of Iowa's coldest temp shivers with rest of state. USA TODAY. [2020-04-06]. （原始内容存档于2020-02-28）.
Average Annual Precipitation Iowa, 1961–1990 (GIF File) （页面存档备份，存于互联网档案馆）—Christopher Daly, Jenny Weisburg
Average Weather for Des Moines, IA—Temperature and Precipitation, Weather.com, Retrieved 2009-01-07. Weather.com. [2010-07-31]. （原始内容存档于2010-12-03）.
Iowa Weather-Iowa Weather Forecast-Iowa Climate. ustravelweather.com. [2011-02-17]. （原始内容存档于2011-01-31）.
Monthly Averages for Davenport, Iowa. Weather.com. [2008-11-01]. （原始内容存档于2008-10-08）.
Average Weather for Des Moines, IA—Temperature and Precipitation. Weather.com. [2012-02-18]. （原始内容存档于2012-10-24）.
Daily Averages for Keokuk, IA. weather.com. [2012-02-18]. （原始内容存档于2012-10-24）.
Average Weather for Mason City, IA—Temperature and Precipitation. Weather.com. [2012-02-18]. （原始内容存档于2012-10-24）.
Average Weather for Sioux City, IA—Temperature and Precipitation. Weather.com. [2012-02-18]. （原始内容存档于2012-10-24）.
Historical Population Change Data (1910–2020). Census.gov. United States Census Bureau. [2021-12-09]. （原始内容存档于2021-04-29）.
Numeric and Percent Change in Resident Population (PDF). 2020 Census Apportionment Results. United States Census Bureau, Population Division. 2021-04-26 [2021-04-27]. （原始内容 (PDF)存档于2021-04-26）.
U.S. Census quickfacts. United States Census Bureau. [2015-04-02]. （原始内容存档于2010-05-27）.
U.S. Census website. [2020-01-18]. （原始内容存档于1996-12-27）.
2019 American Community Survey—Demographic and Housing Estimates. United States Census Bureau. [2021-04-28]. （原始内容存档于1996-12-27）.
Historical Census Statistics on Population Totals By Race, 1790 to 1990, and By Hispanic Origin, 1970 to 1990, For The United States, Regions, Divisions, and States. Census.gov. [2014-07-26]. （原始内容存档于2008-07-25）.
Population of Iowa: Census 2010 and 2000 Interactive Map, Demographics, Statistics, Quick Facts. Censusviewer.com. [2014-07-26]. （原始内容存档于2016-03-04）.
2010 Census Data. 2010 Census Data. Census.gov. [2014-07-26]. （原始内容存档于2017-05-22）.
Race and Ethnicity in the United States: 2010 Census and 2020 Census. U.S. Census Bureau. 2021-08-12 [2021-08-12]. （原始内容存档于2021-08-15）.
Martin JA, Hamilton BE, Osterman MJ, Curtin SC, Mathews TJ. National Vital Statistics Reports—Births: Final Data for 2013 (PDF) (报告) 64. U.S. Department of Health and Human Services: 35–6. 2015-01-15 [2019-02-03]. （原始内容 (PDF)存档于2017-09-11）. |issue=被忽略 (帮助)
Hamilton BE, Martin JA, Osterman MJ, Curtin SC, Mathews TJ. National Vital Statistics Reports—Births: Final Data for 2014 (PDF) (报告) 64. U.S. Department of Health and Human Services: 35–6. 2015-12-23 [2019-02-03]. （原始内容 (PDF)存档于2017-02-14）. |issue=被忽略 (帮助)
Martin JA, Hamilton BE, Osterman MJ, Driscoll AK. National Vital Statistics Reports—Births: Final Data for 2015 (PDF) (报告) 66. U.S. Department of Health and Human Services: 38, 40. 2017-01-05 [2019-02-03]. （原始内容 (PDF)存档于2017-08-31）. |issue=被忽略 (帮助)
Martin JA, Hamilton BE, Osterman MJ, Driscoll AK, Drake P. National Vital Statistics Reports—Births: Final Data 2016 (PDF) (报告) 67. U.S. Department of Health and Human Services: 26. 2018-01-31 [2019-02-03]. （原始内容 (PDF)存档于2018-06-03）. |issue=被忽略 (帮助)
Martin JA, Hamilton BE, Osterman MJ, Driscoll AK, Drake P. National Vital Statistics Reports—Births, by race and origin of mother: United States, each state and territory, 2017 (PDF) (报告) 67: 20. 2018-11-07 [2021-12-09]. （原始内容 (PDF)存档于2019-02-01）. |number=被忽略 (帮助)
Martin, Joyce A.; Hamilton, Brady E.; Osterman, Michelle J.K.; Driscoll, Anne K. Births: Final Data for 2018 (PDF) (报告). 2019-11-27 [2021-12-09]. （原始内容 (PDF)存档于2019-11-28）.
Data (PDF). Cdc.gov. [2021-03-29]. （原始内容 (PDF)存档于2021-03-24）.
QuickFacts: Iowa. Census.gov. U.S. Census Bureau. [2020-01-01]. （原始内容存档于2019-11-10）.
America's Top States for Business in 2010. CNBC. [2011-05-09]. （原始内容存档于2011-12-26）.
Iowa State University. Gross domestic product by sector and state. Regional Capacity Analysis Program. Retrieved on: April 26, 2008. 互联网档案馆的存檔，存档日期2008-10-09.
Iowa Quick Facts—State Data Center. Statelibraryofiowa.org. 2010-06-28 [2010-07-31]. （原始内容存档于2010-11-04）.
Iowa officials tout credit rating, argue it shows state's finances are strong, Associated Press July 3, 2009, Timesrepublican.com 互联网档案馆的存檔，存档日期2010-09-07.
Iowa's Unemployment Rate Falls To 4.0 Percent In September. 2021-10-22 [2021-12-07]. （原始内容存档于2021-11-08）.
Our story-locations. Tysonfoods.com. [2014-07-16]. （原始内容存档于2014-07-04）.
Electric Power Monthly. U.S. Department of Energy, Energy Information Administration. [2020-06-02]. （原始内容存档于2018-02-06）.
Eller, Donnelle. Looking for greater profits, more Iowa farmers move to organic corn, soybeans. The Des Moines Register. 2017-11-03 [2019-01-21]. （原始内容存档于2021-02-20）.
Iowa Organic Association. [2019-04-16]. （原始内容存档于2019-04-16）.
Northeast Iowa Local Foods Expansion Plan (PDF), Northeast Iowa Resource Conservation and Development, [2019-01-21], （原始内容 (PDF)存档于2019-01-21）
Grow The Local Food System, Northeast Iowa Resource Conservation and Development, [2019-01-21], （原始内容存档于2019-01-22）
Swenson, David A; Eathington, Liesl. Multiple Measures of the Role of Agriculture in Iowa's Economy. Iowa State University, Department of Economics. Staff General Research Papers, number 10180. 2002-12-01 [2014-07-26]. （原始内容存档于2014-07-15）.
Goldin C, Katz LF. Why the United States Led in Education: Lessons from Secondary School Expansion, 1910 to 1940 （页面存档备份，存于互联网档案馆）. In: Eltis D, Lewis F, Sokoloff K Human Capital and Institutions. Cambridge University Press ; 2009.
About the Iowa Education System. Iowa Department of Education. [2019-11-03]. （原始内容存档于2019-11-03）.
Rankings And Estimates Report 2018 (PDF). National Education Association. [2019-11-03]. （原始内容 (PDF)存档于2019-11-12）.
Boden, Sarah. Lawmakers Scrounge Up Bus Money for Rural School Districts. Iowa Public Radio. 2015-02-03 [2018-06-18]. （原始内容存档于2018-06-17）.
Bellevue school board sets referendum for $16 million bond issuance. Telegraph Herald. [2019-11-03]. （原始内容存档于2019-11-03）.
What is the Board of Regents?. Iowaregents.edu. 2016-06-22 [2020-04-15]. （原始内容存档于2020-06-11）.
Carnegie Classifications | Standard Listings. carnegieclassifications.iu.edu. [2020-04-21]. （原始内容存档于2020-06-11）.
Our Members | Association of American Universities (AAU). Aau.edu. [2020-04-21]. （原始内容存档于2021-11-11）.
Swenson, David, The Economic Impact of the Iowa Caucus: Gauging the Worth of Its First‐in‐the‐Nation Position? (PDF), April 2008 [2020-04-22], （原始内容 (PDF)存档于2020-04-04）
Leip, David. General Election Results – Iowa. United States Election Atlas. [2021-01-29]. （原始内容存档于2018-07-09）.
James Q. Lynch. What happens at a caucus?. iowacaucus.com. 2007-11-19. （原始内容存档于2007-12-22）.
Donovan, Todd; Hunsaker, Rob. Beyond expectations: effects of early elections in U.S. presidential nomination contests. PS: Political Science & Politics. January 2009, 42 (1): 45–52 [2016-01-30]. S2CID 42839320. doi:10.1017/S1049096509090040. （原始内容存档于2016-07-15）.
American Religious Identification Survey 2001 (PDF). The Graduate Center of the City University of New York. [2012-01-04]. （原始内容 (PDF)存档于2012-05-16）.
The Association of Religion Data Archives | State Membership Report. thearda.com. [2013-11-12]. （原始内容存档于2013-11-12）.
Explore Census Data. data.census.gov. [2021-05-03]. （原始内容存档于2021-05-03）.
2000 U.S. Census: Census.gov （页面存档备份，存于互联网档案馆）
Iowa-Languages. City Data. [2010-07-28]. （原始内容存档于2010-11-01）.
Religious composition of adults in Iowa. Pew Research Center. [2019-08-18]. （原始内容存档于2017-08-01）.
Iowa Sister States. Iowa Sister States. [2023-08-02]. （原始内容存档于2023-08-02）（英语）.

worldcat.org

Terrestrial ecoregions of North America : a conservation assessment. Ricketts, Taylor H. Washington, D.C.: Island Press. 1999. ISBN 1-55963-722-6. OCLC 40856986.

worldwildlife.org

Central tall grasslands | Ecoregions | WWF. World Wildlife Fund. [2020-04-07]. （原始内容存档于2020-08-10）.