"United States Census, 1870," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MZLS-P57 : 12 April 2016), Henrietta Kaufman in household of Simon Kaufman, Pennsylvania, United States; citing p. 65, family 432, NARA microfilm publication M593 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 552,790
"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MW6C-G28 : 16 July 2017), Henritta Kaufman in household of Simon Kaufman, Allegheny, Allegheny, Pennsylvania, United States; citing enumeration district ED 14, sheet 364A, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 1086; FHL microfilm 1,255,086..
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MS1D-18B : accessed 18 January 2018), Henrietta Kaufmann in household of Ludwig Kaufmann, Precinct 5 Allegheny city Ward 4, Allegheny, Pennsylvania, United States; citing enumeration district (ED) 41, sheet 9B, family 169, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,241,355.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MGQ8-T51 : accessed 18 January 2018), Henrietta Kaufman in household of Ludwig Kaufman, Pittsburgh Ward 23, Allegheny, Pennsylvania, United States; citing enumeration district (ED) ED 593, sheet 16B, family 277, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 1306; FHL microfilm 1,375,319.
"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M4PD-1VP : accessed 18 January 2018), Henrietta Kaufman in household of Ludwig Kaufman, Atlantic City Ward 1, Atlantic, New Jersey, United States; citing ED 3, sheet 8B, line 57, family 311, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 1015; FHL microfilm 1,821,015.
"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:X487-PWT : accessed 18 January 2018), Henrietta Kaufman in household of Ludwig Kaufman, Ventnor City, Atlantic, New Jersey, United States; citing enumeration district (ED) ED 72, sheet 2A, line 28, family 41, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 1310; FHL microfilm 2,341,045.