"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MM28-FWT : accessed 22 June 2019), Nina O Blank in household of Mary J Blank, Reedsburg city Ward 1-2, Sauk, Wisconsin, United States; citing enumeration district (ED) 142, sheet 10A, family 239, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,241,816.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MPV3-GG3 : accessed 22 June 2019), Nina F Blank in household of Mary J Blank, Reedsburg Ward 2, Sauk, Wisconsin, United States; citing enumeration district (ED) ED 124, sheet 1A, family 5, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 1736; FHL microfilm 1,375,749.