"United States Census, 1940," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:K3B3-J28 : 7 January 2021), David Blaustein in household of Harry Blaustein, Hempstead, Nassau, New York, United States; citing enumeration district (ED) 30-189, sheet 7B, line 73, family 144, 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 2689.
"New York, New York City Marriage Licenses Index, 1950-1995," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:QLS1-TRWR : 19 June 2017), David Blaustein and Judith Fankushen, 1958, Queens, New York City, New York, United States;Marriage, Queens, New York City, New York, United States, from Reclaim the Records, The NYC Marriage Index (http://www.nycmarriageindex.com : 2016); citing New York City Clerk's Office.
"United States Social Security Death Index," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:VS7M-948 : 12 January 2021), David Blaustein, 15 Aug 2008; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing).
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