"United States Census, 1860", database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M4NH-561 : 30 December 2015), Oscar Rankin in entry for David W Rankin, 1860.
"United States Census, 1870," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MX6N-8ZZ : 17 October 2014), Oscar Rankin in household of David W Rankin, Indiana, United States; citing p. 31, family 220, NARA microfilm publication M593 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 545,865.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MKRW-6SC : accessed 10 June 2017), Oscar Rankin in household of Sarah E Rankin, Terre Haute Ward 5, Vigo, Indiana, United States; citing enumeration district (ED) ED 158, sheet 6B, family 143, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 385; FHL microfilm 1,374,398.
"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MF4R-GXG : accessed 10 June 2017), Oscar Rankin, Terre Haute Ward 5, Vigo, Indiana, United States; citing ED 143, sheet 4B, line 76, family 79, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 468; FHL microfilm 1,820,468.
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