"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M2BD-ZJH : accessed 24 September 2022), Sophia Theissen in household of Alvine Theissen, Loutre, Montgomery, Missouri, United States; citing enumeration district (ED) ED 103, sheet 1A, family 1, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 800; FHL microfilm 1,374,813.
"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XHNQ-QHN : accessed 24 September 2022), Sophia Theissen in household of Alvin Theissen, Loutre, Montgomery, Missouri, United States; citing enumeration district (ED) ED 13, sheet 10B, line 70, family 225, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 1213; FHL microfilm 2,340,948.
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