"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M573-CLF : accessed 18 June 2020), Samuel Kaufman in household of Soloman Kaufman, Manhattan Ward 12, New York, New York, United States; citing enumeration district (ED) ED 468, sheet 12A, family 252, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 1019; FHL microfilm 1,375,032.
"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MJB5-RVR : accessed 18 June 2020), Sol Kaufman in household of Solomon Haufman, Manhattan Assembly District 15, New York, New York, United States; citing ED 1103, sheet 15B, line 78, family 320, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 1214; FHL microfilm 1,821,214.
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