"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MG95-3K9 : accessed 23 September 2015), Gertrude Mashek in household of James P Mashek, Calmar, Winneshiek, Iowa, United States; citing enumeration district (ED) 147, sheet 10A, family 211, NARA microfilm publication T624 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,374,441.
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