Oskaloosa, Iowa (English Wikipedia)

"2,500 give final salute to coach Ed Thomas". Des Moines Register. February 10, 2010. Archived from the original on January 15, 2014. Retrieved January 14, 2014.

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Iowa Geological Survey Annual Report for 1908. Published for the Iowa Geological Survey. 1909. p. 556.
George E., Roberts (1888). Third Biennial Report of the State Mine Inspectors to the Governor of Iowa for the years 1886 and 1887. p. 87.
Conaway, Des Moines, 1895, Seventh Biennial Report of the State Mine Inspectors to the Governor of the State of Iowa for the two years ending June 30, 1895, page 50.
Saward, Frederick E. (1915). The Coal Trade. p. 65.
Iowa State Gazetteer and Business Directory, 1905-1906, Vol XIII, R. L. Polk & Co., 1905; page 893, column 2 center.
Albert H. Fay, Coal-Mine Fatalities in the United States 1870–1914, Department of the Interior, Bureau of Mines, Washington DC, 1916, page 190.
Paul Garvin, Iowa's Minerals, Burr Oak Books, 1998, pages 198–199.

"2020 U.S. Gazetteer Files". United States Census Bureau. Retrieved March 16, 2022.
"2020 Census State Redistricting Data". census.gov. United states Census Bureau. Retrieved August 12, 2021.

Noble, Jason (July 24, 2015). "Trump barring Des Moines Register from campaign event". Des Moines Register. Retrieved September 27, 2015.
"2,500 give final salute to coach Ed Thomas". Des Moines Register. February 10, 2010. Archived from the original on January 15, 2014. Retrieved January 14, 2014.

"U.S. Climate Normals Quick Access (1991–2020)". National Oceanic and Atmospheric Administration. Retrieved August 3, 2022.
"U.S. Climate Normals Quick Access (1981–2010)". National Oceanic and Atmospheric Administration. Retrieved August 31, 2022.

"Eagen A Humble Hero". Oskaloosa Herald. June 29, 2009. Retrieved February 11, 2014.

"Oskaloosa History". Community Profile Network, Inc. Retrieved January 21, 2011.

Chisholm, Hugh, ed. (1911). "Oskaloosa" . Encyclopædia Britannica. Vol. 20 (11th ed.). Cambridge University Press. p. 351.