↑ United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M3M9-4P2 : accessed 6 May 2020), Melville Wolff in household of Leopold Wolff, Braddock borough Ward 1, Allegheny, Pennsylvania, United States; citing enumeration district (ED) 347, sheet 18B, family 349, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,241,365.
↑ United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MKLH-5J7 : accessed 9 August 2019), Melville Wolff in household of Mina Oppenheimer, Precinct 1, Washington, District of Columbia, United States; citing enumeration district (ED) ED 3, sheet 11B, family 222, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 149; FHL microfilm 1,374,162. WITH MOTHER AND SIBLINGS, LIVING WITH MATERNAL GRANDMOTHER.
↑ United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MJBW-KXS : accessed 9 August 2019), Melville Wolff in household of Hannah Wolff, Manhattan Assembly District 11, New York, New York, United States; citing ED 819, sheet 14A, line 16, family 255, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 1205; FHL microfilm 1,821,205.
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