"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MZFT-SPQ : 14 July 2016), Mary C House in household of Petter A House, Wallace, Steuben, New York, United States; citing enumeration district ED 155, sheet 359B, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 0932; FHL microfilm 1,254,932.
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MSG8-BB7 : accessed 4 May 2017), Mary Davis in household of Eugene Davis, Avoca Township (part) Avoca village, Steuben, New York, United States; citing enumeration district (ED) 57, sheet 8A, family 197, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,241,162.
"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MVSN-M7M : accessed 7 May 2017), Matie Davis in household of E Eugene Davis, Avoca, Steuben, New York, United States; citing ED 77, sheet 6B, line 62, family 192, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 1266; FHL microfilm 1,821,266.
"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:X4YS-4HQ : accessed 7 May 2017), Mary K Davis in household of E Eugene Davis, Avoca, Steuben, New York, United States; citing enumeration district (ED) ED 3, sheet 3B, line 72, family 91, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 1648; FHL microfilm 2,341,382.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KQYR-NH7 : accessed 7 May 2017), Mary C Davis in household of Leo F Davis, Avoca Town, Steuben, New York, United States; citing enumeration district (ED) 51-4, sheet 6A, line 19, family 125, Sixteenth Census of the United States, 1940, NARA digital publication T627. Records of the Bureau of the Census, 1790 - 2007, RG 29. Washington, D.C.: National Archives and Records Administration, 2012, roll 2780.
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