Tractor (English Wikipedia)

Gaines, Tharran (2021-11-28). "An electric tractor may be in your future". Successful Farming. Archived from the original on 2022-07-23. Retrieved 2022-07-23.

archive.org (Global: 6^th place; English: 6^th place)

Houghton Mifflin (2000). The American Heritage Dictionary of the English Language (4th ed.). Boston and New York: Houghton Mifflin. pp. 1829. ISBN 978-0-395-82517-4.
Miller, Orrin E. (2003). "John Froelich: The Story of a Man and a Tractor". In Macmillan, Don (ed.). The John Deere Tractor Legacy. Voyageur Press. ISBN 978-0-89658-619-2.

bbc.co.uk (Global: 11^th place; English: 10^th place)

"Ashbourne tractor light run set to spread Christmas cheer". BBC News. 6 December 2025. Retrieved 7 December 2025.

biggleswadehistory.org.uk (Global: low place; English: low place)

"Dan Albone". Biggleswade History Society. Archived from the original on 2012-03-15. Retrieved 2013-08-30.

books.google.com (Global: 3^rd place; English: 3^rd place)

The John Deere Tractor Legacy. Voyageur Press. p. 45. ISBN 9781610605298.
Vintage Farm Tractors. Voyageur Press. 1996. p. 14. ISBN 9781610605649.
Xulon Press. Xulon Press. June 2002. ISBN 978-1-59160-134-0.
Ultimate John Deere: The History of the Big Green Machines. Voyageur Press. 2001. p. 52. ISBN 9781610605588.
Miller, Orrin E. (2003). "John Froelich: The Story of a Man and a Tractor". In Macmillan, Don (ed.). The John Deere Tractor Legacy. Voyageur Press. ISBN 978-0-89658-619-2.
Wendel, C.H. (2011). Oliver Hart-Parr. Krause Publications. ISBN 978-0-87349-929-3.
Rumeley, Edward A. (August 1910). "The Passing Of The Man With The Hoe". The World's Work: A History of Our Time. XX: 13246–13258. Retrieved 2009-07-10.
Will, Oscar H. (2009). Garden Tractors: Deere, Cub Cadet, Wheel Horse, and All the Rest, 1930s to Current. Voyageur Press. pp. 81–83. ISBN 978-1-61673-161-8.
Liston, James M. (April 1970). Popular Mechanics. Hearst Magazines. p. 120.
"Three Wheeled Tractor With Implements Handles Small-Farm Work." Popular Mechanics, June 1954, p. 96.
Klancher, Lee; Leffingwell, Randy; Morland, Andrew; Pripps, Robert N. (2003). Farm Tractors. Crestline [Imprint of MBI]. ISBN 978-0-7603-1776-1.^{[permanent dead link]}
Ertel, Patrick W. (2001). The American Tractor: A Century of Legendary Machines. Osceola, WI: MBI. p. 72. ISBN 978-0-7603-0863-9.^{[permanent dead link]}
Pripps, Robert N.; Morland, Andrew (photographer) (1993). Farmall Tractors: History of International McCormick-Deering Farmall Tractors. Farm Tractor Color History Series. Osceola, WI: MBI. p. 28. ISBN 978-0-87938-763-1.
Leffingwell, Randy (2004). Ford Farm Tractors. Motorbooks Classics Series. Osceola, WI: MBI. pp. 43–53. ISBN 978-0-7603-1919-2.^{[permanent dead link]}
Lofting, Richard (28 February 2017). Vintage and Classic Tractor Restoration. The Crowood Press. ISBN 978-1-78500-267-0.
Cawood, Charles L. (1980). Vintage Tractors. Shire. ISBN 978-0-85263-499-8.
Dregni, Michael (October 2003). This Old Tractor: A Treasury of Vintage Tractors and Family Farm Memories. MBI Publishing Company LLC. ISBN 978-0-89658-602-4.

bridportandwestbay.co.uk (Global: low place; English: low place)

"Tractor Trundle". Bridport & West Bay. Retrieved 7 December 2025.

caseih.com (Global: low place; English: low place)

"Track Technology | Quadtrac and Rowtrac Tractors | Case IH". Case IH. Retrieved 2018-06-11.

cdc.gov (Global: 251^st place; English: 248^th place)

blogs.cdc.gov

Keane, Paul R.; McKenzie, Tony (30 April 2013). "Cost-effective Rollover Protective Structure (CROPS)". National Institute for Occupational Safety and Health. Archived from the original on 22 January 2015. Retrieved 21 January 2015.

cnet.com (Global: 447^th place; English: 345^th place)

Szymkowski, Sean (2020-01-29). "Autonomous, electric tractor could be the future face of smart farming". CNET. Retrieved 2022-07-23.

cumminsengines.com (Global: low place; English: low place)

"QSL9 for Agriculture (Tier 4 Interim)". Cummins Engines. Retrieved 2018-06-11.

deere.com (Global: low place; English: low place)

salesmanual.deere.com

"Attachments, instructional seat". salesmanual.deere.com. Retrieved 14 October 2022.

deere.com

"John Deere Tractors | Row Crop Tractors | John Deere US". www.deere.com. Retrieved 2018-06-11.

doi.org (Global: 2^nd place; English: 2^nd place)

Olmstead, Alan L.; Rhode, Paul W. (2001). "Reshaping the Landscape: The Impact and Diffusion of the Tractor in American Agriculture, 1910–1960". The Journal of Economic History. 61 (3): 663–698. doi:10.1017/S0022050701030042. ISSN 0022-0507. JSTOR 2698132.
Ellenberg, George B. (2000). "Debating Farm Power: Draft Animals, Tractors, and the United States Department of Agriculture". Agricultural History. 74 (2): 545–568. doi:10.1215/00021482-74.2.545. ISSN 0002-1482. JSTOR 3744871.
Meyer, Carrie A. (2013). "The Farm Debut of the Gasoline Engine". Agricultural History. 87 (3): 287–313. doi:10.3098/ah.2013.87.3.287. ISSN 0002-1482. JSTOR 10.3098/ah.2013.87.3.287.
Clarke, Sally (1991). "New Deal Regulation and the Revolution in American Farm Productivity: A Case Study of the Diffusion of the Tractor in the Corn Belt, 1920–1940". The Journal of Economic History. 51 (1): 101–123. doi:10.1017/S0022050700038389. ISSN 0022-0507. JSTOR 2123053.
Irwin, Amy; Poots, Jill (12 Apr 2018). "Investigation of UK Farmer Go/No-Go Decisions in Response to Tractor-Based Risk Scenarios" (PDF). Journal of Agromedicine. 23 (2): 154–165. doi:10.1080/1059924X.2017.1423000. hdl:2164/12160. PMID 29648955. S2CID 4783478.
Rudolphi, Josie M.; Campo, Shelly; Gerr, Fred; Rohlman, Diane S. (2018-05-01). "Social and Individual Influences on Tractor Operating Practices of Young Adult Agricultural Workers". Journal of Adolescent Health. 62 (5): 605–611. doi:10.1016/j.jadohealth.2017.11.300. ISSN 1054-139X. PMC 8189182. PMID 29478719.

edgeta.com (Global: low place; English: low place)

"National Early Day Gas Engine and Tractor Association – National Early Day". edgeta.com. Retrieved 7 December 2025.

electrek.co (Global: 6,480^th place; English: 4,449^th place)

Doll, Scooter (2022-08-09). "Foxconn to manufacture electric tractors for Monarch at newly acquired Lordstown facility". Electrek. Retrieved 2022-08-10.

etymonline.com (Global: 669^th place; English: 670^th place)

"Tractor". (etymology). Online Etymology Dictionary. Retrieved 2017-08-20.

facebook.com (Global: 78^th place; English: 91^st place)

"Milnthorpe Christmas tractor trundle". Facebook. Retrieved 7 December 2025.

farmcollector.com (Global: low place; English: low place)

"John Charter: Charter Member – Farm Collector". www.farmcollector.com. 2014-05-06. Retrieved 2022-05-19.

froelichtractor.com (Global: low place; English: low place)

"Froelich Tractor". Froelich Foundation. Archived from the original on 2019-08-29. Retrieved 2012-05-15.

gasenginemagazine.com (Global: low place; English: low place)

"When Was The First Tractor Made?? – Gas Engine Magazine". www.gasenginemagazine.com. 1969-03-01. Retrieved 2022-05-19.

gov.uk (Global: 401^st place; English: 228^th place)

"Vehicle registration: Old vehicles". GOV.UK. Retrieved 7 December 2025.

grainews.ca (Global: low place; English: low place)

Garvey, Scott (2021-02-10). "Development of Fendt's e100 electric tractor continues". Grainews. Archived from the original on 2025-05-03. Retrieved 2022-07-24.

greatnorthairambulance.co.uk (Global: low place; English: low place)

Hartley, Araminta (16 September 2014). "Dalston man holds tractor trundle for charity". Great North Air Ambulance Service. Retrieved 7 December 2025.

hdl.handle.net (Global: 66^th place; English: 34^th place)

Irwin, Amy; Poots, Jill (12 Apr 2018). "Investigation of UK Farmer Go/No-Go Decisions in Response to Tractor-Based Risk Scenarios" (PDF). Journal of Agromedicine. 23 (2): 154–165. doi:10.1080/1059924X.2017.1423000. hdl:2164/12160. PMID 29648955. S2CID 4783478.

hobbyfarms.com (Global: low place; English: low place)

Brackney, Susan (2021-09-02). "Electric Tractors Are The Future Of Farming". Hobby Farms. Retrieved 2022-07-23.

inforse.org (Global: low place; English: low place)

"BIODIESEL". www.inforse.org.

insideclimatenews.org (Global: low place; English: low place)

Weisbrod, Katelyn (2022-07-13). "A New Project in Rural Oregon Is Letting Farmers Test Drive Electric Tractors in the Name of Science". Inside Climate News. Retrieved 2022-07-23.

iptv.org (Global: low place; English: low place)

"Gasoline Tractor". Iowa Pathways. 2016-08-17.

iso.org (Global: 1,190^th place; English: 1,097^th place)

"ISO 23205:2014". ISO. Retrieved 14 October 2022.

jsonline.com (Global: 1,443^rd place; English: 671^st place)

archive.jsonline.com

Barrett, Rick (3 May 2014). "Campaign strives to keep young children off tractors". www.jsonline.com. Milwaukee Journal Sentinel. Journal Sentinel. Retrieved 14 October 2022.

jstor.org (Global: 23^rd place; English: 15^th place)

Wik, Reynold M. (1964). "Henry Ford's Tractors and American Agriculture". Agricultural History. 38 (2): 81–83. JSTOR 3740673.
Olmstead, Alan L.; Rhode, Paul W. (2001). "Reshaping the Landscape: The Impact and Diffusion of the Tractor in American Agriculture, 1910–1960". The Journal of Economic History. 61 (3): 663–698. doi:10.1017/S0022050701030042. ISSN 0022-0507. JSTOR 2698132.
Olmstead, Alan L.; Rhode, Paul W. (1994). "The Agricultural Mechanization Controversy of the Interwar Years". Agricultural History. 68 (3): 35–53. ISSN 0002-1482. JSTOR 3744148.
Ellenberg, George B. (2000). "Debating Farm Power: Draft Animals, Tractors, and the United States Department of Agriculture". Agricultural History. 74 (2): 545–568. doi:10.1215/00021482-74.2.545. ISSN 0002-1482. JSTOR 3744871.
Meyer, Carrie A. (2013). "The Farm Debut of the Gasoline Engine". Agricultural History. 87 (3): 287–313. doi:10.3098/ah.2013.87.3.287. ISSN 0002-1482. JSTOR 10.3098/ah.2013.87.3.287.
Ankli, Robert E. (1980). "Horses vs. Tractors on the Corn Belt". Agricultural History. 54 (1): 134–148. ISSN 0002-1482. JSTOR 3742600.
Clarke, Sally (1991). "New Deal Regulation and the Revolution in American Farm Productivity: A Case Study of the Diffusion of the Tractor in the Corn Belt, 1920–1940". The Journal of Economic History. 51 (1): 101–123. doi:10.1017/S0022050700038389. ISSN 0022-0507. JSTOR 2123053.
Jasny, Naum (1935). "Tractor Versus Horse as a Source of Farm Power". The American Economic Review. 25 (4): 708–723. ISSN 0002-8282. JSTOR 1807806.

ladiestractorroadrun.co.uk (Global: low place; English: low place)

"Ladies Tractor Road Run". www.ladiestractorroadrun.co.uk. Retrieved 7 December 2025.

livinghistoryfarm.org (Global: low place; English: low place)

"Tractors Advance during the Depression". livinghistoryfarm.org. Archived from the original on 2026-01-05. Retrieved 2020-12-09.
"Tractors Advance during the Depression". Livinghistoryfarm.org. Archived from the original on 2021-02-22. Retrieved 2010-07-29.

lowtechmagazine.com (Global: low place; English: low place)

"Wood gas vehicles: Firewood in the fuel tank". Low-Tech Magazine. 18 January 2010. Archived from the original on 2022-02-21. Retrieved 2025-03-08.

magazine.co.uk (Global: low place; English: low place)

"Tractor & Machinery Magazines". magazine.co.uk. Retrieved 7 December 2025.

merriam-webster.com (Global: 425^th place; English: 373^rd place)

unabridged.merriam-webster.com

Merriam-Webster Unabridged (MWU). (Online subscription-based reference service of Merriam-Webster, based on Webster's Third New International Dictionary, Unabridged. Merriam-Webster, 2002.) Headword tractor. Accessed 2007-09-22.

nasdonline.org (Global: low place; English: low place)

Murphy, Dennis (1991). "Tractor Overturn Hazards". National Ag Safety Database. Retrieved 2020-02-24.

newholland.com (Global: low place; English: low place)

agriculture1.newholland.com

"GENESIS® T8 Series – Tier 4B – Overview | Tractors ＆ Telehandlers | New Holland (US)". agriculture1.newholland.com. Archived from the original on 2018-06-21. Retrieved 2018-06-11.

nih.gov (Global: 5^th place; English: 5^th place)

pubmed.ncbi.nlm.nih.gov

Irwin, Amy; Poots, Jill (12 Apr 2018). "Investigation of UK Farmer Go/No-Go Decisions in Response to Tractor-Based Risk Scenarios" (PDF). Journal of Agromedicine. 23 (2): 154–165. doi:10.1080/1059924X.2017.1423000. hdl:2164/12160. PMID 29648955. S2CID 4783478.
Rudolphi, Josie M.; Campo, Shelly; Gerr, Fred; Rohlman, Diane S. (2018-05-01). "Social and Individual Influences on Tractor Operating Practices of Young Adult Agricultural Workers". Journal of Adolescent Health. 62 (5): 605–611. doi:10.1016/j.jadohealth.2017.11.300. ISSN 1054-139X. PMC 8189182. PMID 29478719.

ncbi.nlm.nih.gov

Rudolphi, Josie M.; Campo, Shelly; Gerr, Fred; Rohlman, Diane S. (2018-05-01). "Social and Individual Influences on Tractor Operating Practices of Young Adult Agricultural Workers". Journal of Adolescent Health. 62 (5): 605–611. doi:10.1016/j.jadohealth.2017.11.300. ISSN 1054-139X. PMC 8189182. PMID 29478719.

nvtec.co.uk (Global: low place; English: low place)

"Our History". nvtec.co.uk. NVTEC. Retrieved 7 December 2025.
"Tractor Registrations". nvtec.co.uk. NVTEC. Retrieved 7 December 2025.

ourworldindata.org (Global: 2,491^st place; English: 1,740^th place)

"Tractors per 100 square kilometres of arable land". Our World in Data. Retrieved 7 March 2020.

psu.edu (Global: 299^th place; English: 159^th place)

extension.psu.edu

"Forage and Food Crops". Penn State Extension.

rnli.org (Global: low place; English: 5,511^th place)

"St Bees Tractor Trundle raises funds for the RNLI". rnli.org. RNLI. 27 December 2023. Retrieved 7 December 2025.

scienceandsociety.co.uk (Global: low place; English: low place)

"Dan Albone, English inventor, 1902". The Science and Society Picture Library. Retrieved 2013-08-30.

semanticscholar.org (Global: 15^th place; English: 8^th place)

api.semanticscholar.org

Irwin, Amy; Poots, Jill (12 Apr 2018). "Investigation of UK Farmer Go/No-Go Decisions in Response to Tractor-Based Risk Scenarios" (PDF). Journal of Agromedicine. 23 (2): 154–165. doi:10.1080/1059924X.2017.1423000. hdl:2164/12160. PMID 29648955. S2CID 4783478.

si.edu (Global: 256^th place; English: 197^th place)

americanhistory.si.edu

"Smithsonian Museum of American History". Hart Parr #3. Retrieved 2010-11-29.

teesdalemercury.co.uk (Global: low place; English: low place)

"Tractor run raises over £3,500 in epic coast to coast challenge". Teesdale Mercury. 10 June 2025. Retrieved 7 December 2025.

thefield.co.uk (Global: low place; English: low place)

Menzies, Janet (7 December 2024). "Christmas tractor runs – what are they and how did they start?". The Field. Retrieved 7 December 2025.

theinspiredmedia.com (Global: low place; English: low place)

"From Steam to Gasoline…". Inspired Media. 2009-08-21. Archived from the original on 2012-02-24. Retrieved 2010-07-19.

theknaresboroughtractorrun.org (Global: low place; English: low place)

"The Knaresborough Tractor Run". theknaresboroughtractorrun.org. Retrieved 7 December 2025.

thoughtco.com (Global: 2,170^th place; English: 1,937^th place)

"The Evolution and History of the Farm Tractor That Changed Everything". ThoughtCo. Retrieved 2022-05-19.

tractorbynet.com (Global: low place; English: low place)

"Tractor Sizing – Almost Daily Thread: Subcompact or Compact Tractor?". 22 April 2019.

tractorexport.com (Global: low place; English: low place)

"Compact and Sub-Compact Tractors Compared". 30 June 2017.

unl.edu (Global: 1,697^th place; English: 926^th place)

digitalcommons.unl.edu

Splinter, William (January 2012). "The Biological Systems Engineering Program in Nebraska 1895–2011". Biological Systems Engineering: Papers and Publications. Retrieved 10 January 2018.

versatile-ag.com (Global: low place; English: low place)

"Versatile – MFWD Tractors". www.versatile-ag.com. Retrieved 2018-06-11.

web.archive.org (Global: 1^st place; English: 1^st place)

"Tractors Advance during the Depression". livinghistoryfarm.org. Archived from the original on 2026-01-05. Retrieved 2020-12-09.
"Froelich Tractor". Froelich Foundation. Archived from the original on 2019-08-29. Retrieved 2012-05-15.
"From Steam to Gasoline…". Inspired Media. 2009-08-21. Archived from the original on 2012-02-24. Retrieved 2010-07-19.
"Dan Albone". Biggleswade History Society. Archived from the original on 2012-03-15. Retrieved 2013-08-30.
Gaines, Tharran (2021-11-28). "An electric tractor may be in your future". Successful Farming. Archived from the original on 2022-07-23. Retrieved 2022-07-23.
Garvey, Scott (2021-02-10). "Development of Fendt's e100 electric tractor continues". Grainews. Archived from the original on 2025-05-03. Retrieved 2022-07-24.
"Wood gas vehicles: Firewood in the fuel tank". Low-Tech Magazine. 18 January 2010. Archived from the original on 2022-02-21. Retrieved 2025-03-08.
BE energy promoting biodiesel for use in tractors. Department of the Environment and Heritage, Australila
Jatropha being used to run a tractor. CNN (2008-08-08)
Ayers, P.D. (2010) General Tractor Safety. Colorado State University
Keane, Paul R.; McKenzie, Tony (30 April 2013). "Cost-effective Rollover Protective Structure (CROPS)". National Institute for Occupational Safety and Health. Archived from the original on 22 January 2015. Retrieved 21 January 2015.
"Tractors Advance during the Depression". Livinghistoryfarm.org. Archived from the original on 2021-02-22. Retrieved 2010-07-29.
"GENESIS® T8 Series – Tier 4B – Overview | Tractors ＆ Telehandlers | New Holland (US)". agriculture1.newholland.com. Archived from the original on 2018-06-21. Retrieved 2018-06-11.

wisfarmer.com (Global: low place; English: low place)

"Tragedy averted: 90-second video speaks to Wisconsin farmers". Wisconsin State Farmer. Retrieved 2018-05-03.

worldcat.org (Global: 4^th place; English: 4^th place)

search.worldcat.org

Olmstead, Alan L.; Rhode, Paul W. (2001). "Reshaping the Landscape: The Impact and Diffusion of the Tractor in American Agriculture, 1910–1960". The Journal of Economic History. 61 (3): 663–698. doi:10.1017/S0022050701030042. ISSN 0022-0507. JSTOR 2698132.
Olmstead, Alan L.; Rhode, Paul W. (1994). "The Agricultural Mechanization Controversy of the Interwar Years". Agricultural History. 68 (3): 35–53. ISSN 0002-1482. JSTOR 3744148.
Ellenberg, George B. (2000). "Debating Farm Power: Draft Animals, Tractors, and the United States Department of Agriculture". Agricultural History. 74 (2): 545–568. doi:10.1215/00021482-74.2.545. ISSN 0002-1482. JSTOR 3744871.
Meyer, Carrie A. (2013). "The Farm Debut of the Gasoline Engine". Agricultural History. 87 (3): 287–313. doi:10.3098/ah.2013.87.3.287. ISSN 0002-1482. JSTOR 10.3098/ah.2013.87.3.287.
Ankli, Robert E. (1980). "Horses vs. Tractors on the Corn Belt". Agricultural History. 54 (1): 134–148. ISSN 0002-1482. JSTOR 3742600.
Clarke, Sally (1991). "New Deal Regulation and the Revolution in American Farm Productivity: A Case Study of the Diffusion of the Tractor in the Corn Belt, 1920–1940". The Journal of Economic History. 51 (1): 101–123. doi:10.1017/S0022050700038389. ISSN 0022-0507. JSTOR 2123053.
Jasny, Naum (1935). "Tractor Versus Horse as a Source of Farm Power". The American Economic Review. 25 (4): 708–723. ISSN 0002-8282. JSTOR 1807806.
Rudolphi, Josie M.; Campo, Shelly; Gerr, Fred; Rohlman, Diane S. (2018-05-01). "Social and Individual Influences on Tractor Operating Practices of Young Adult Agricultural Workers". Journal of Adolescent Health. 62 (5): 605–611. doi:10.1016/j.jadohealth.2017.11.300. ISSN 1054-139X. PMC 8189182. PMID 29478719.

youtube.com (Global: 13^th place; English: 14^th place)

"Kubota BX Series VS. B Series". YouTube. 5 July 2017.

Tractor (English Wikipedia)

abdn.ac.uk (Global: 8,392nd place; English: 6,063rd place)

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caseih.com (Global: low place; English: low place)

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deere.com (Global: low place; English: low place)

salesmanual.deere.com

deere.com

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edgeta.com (Global: low place; English: low place)

electrek.co (Global: 6,480th place; English: 4,449th place)

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facebook.com (Global: 78th place; English: 91st place)

farmcollector.com (Global: low place; English: low place)

froelichtractor.com (Global: low place; English: low place)

gasenginemagazine.com (Global: low place; English: low place)

gov.uk (Global: 401st place; English: 228th place)

grainews.ca (Global: low place; English: low place)

greatnorthairambulance.co.uk (Global: low place; English: low place)

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livinghistoryfarm.org (Global: low place; English: low place)

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nih.gov (Global: 5th place; English: 5th place)

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ncbi.nlm.nih.gov

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scienceandsociety.co.uk (Global: low place; English: low place)

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teesdalemercury.co.uk (Global: low place; English: low place)

thefield.co.uk (Global: low place; English: low place)

theinspiredmedia.com (Global: low place; English: low place)

theknaresboroughtractorrun.org (Global: low place; English: low place)

thoughtco.com (Global: 2,170th place; English: 1,937th place)

tractorbynet.com (Global: low place; English: low place)

tractorexport.com (Global: low place; English: low place)

unl.edu (Global: 1,697th place; English: 926th place)

digitalcommons.unl.edu

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etymonline.com (Global: 669^th place; English: 670^th place)

facebook.com (Global: 78^th place; English: 91^st place)

gov.uk (Global: 401^st place; English: 228^th place)

hdl.handle.net (Global: 66^th place; English: 34^th place)

iso.org (Global: 1,190^th place; English: 1,097^th place)

jsonline.com (Global: 1,443^rd place; English: 671^st place)

jstor.org (Global: 23^rd place; English: 15^th place)

merriam-webster.com (Global: 425^th place; English: 373^rd place)

nih.gov (Global: 5^th place; English: 5^th place)

ourworldindata.org (Global: 2,491^st place; English: 1,740^th place)

psu.edu (Global: 299^th place; English: 159^th place)

rnli.org (Global: low place; English: 5,511^th place)

semanticscholar.org (Global: 15^th place; English: 8^th place)

si.edu (Global: 256^th place; English: 197^th place)

thoughtco.com (Global: 2,170^th place; English: 1,937^th place)

unl.edu (Global: 1,697^th place; English: 926^th place)

web.archive.org (Global: 1^st place; English: 1^st place)

worldcat.org (Global: 4^th place; English: 4^th place)

youtube.com (Global: 13^th place; English: 14^th place)