↑ "United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M9LJ-WT1 : 20 January 2015), Harriett Vandemark in household of Fre*Man Vandemark, Grove Township, Shelby, Iowa, United States; citing sheet 3A, family 42, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,240,459.
↑ "United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MG98-1FH : accessed 12 May 2018), Hoyt Vandermark in household of Fremont Vandermark, Grove, Shelby, Iowa, United States; citing enumeration district (ED) ED 169, sheet 8A, family 134, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 423; FHL microfilm 1,374,436.
↑ "United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MDMJ-QK9 : 14 December 2015), Hariett Vondemark in household of F A Vondemark, Grove, Shelby, Iowa, United States; citing sheet 4B, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,820,513.
↑ "United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KMY7-L6X : 17 May 2014), Harriet Hansen in household of William E Hansen, Woodbine, Boyer Township, Harrison, Iowa, United States; citing enumeration district (ED) 43-2, sheet 17B, family 393, NARA digital publication T627 (Washington, D.C.: National Archives and Records Administration, 2012), roll 1166.
↑ "United States Social Security Death Index," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:JLGM-K2K : 19 May 2014), Harriet Hansen, 11 Apr 1989; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing).
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