"Minnesota State Census, 1895," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MQDY-57N : 26 November 2014), Thedore Ackerman in household of Henry Ackerman, Forest City, Meeker, Minnesota; citing p. 5, line 37, State Library and Records Service, St.Paul; FHL microfilm 565,789.
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M9VR-B6C : accessed 18 May 2017), Theodore H Ackermann in household of Henry Ackermann, Townships 159-161-Ranges 86-89, Ward, North Dakota, United States; citing enumeration district (ED) 246, sheet 17A, family 315, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,241,234.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MLGG-4F4 : accessed 18 May 2017), Theodore K Ackerman in household of Henry Ackerman, Ellendale, Ward, North Dakota, United States; citing enumeration district (ED) ED 172, sheet 10A, family 164, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 1149; FHL microfilm 1,375,162.
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