"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MPJP-L4M : accessed 22 December 2021), John Schmitz in household of Henry Schmitz, Cross Plains, Dane, Wisconsin, United States; citing enumeration district (ED) ED 47, sheet 6B, family 121, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 1708; FHL microfilm 1,375,721.
"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:X9Q9-4RT : accessed 22 December 2021), John Schmitz, Madison, Dane, Wisconsin, United States; citing enumeration district (ED) ED 43, sheet 14A, line 31, family 355, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 2567; FHL microfilm 2,342,301.
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