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- [S83] Folketelling USA 01.04.1930, Census Place: Brooklyn, Kings, New York; Page: 13A; Enumeration District: 0923; FHL microfilm: 2341226 (Troverdighet: 3).
- [S46] Ancestry.com, New York, New York, U.S., Index to Birth Certificates, 1866-1909 [database on-line]. Lehi, UT USA: 2020. (Troverdighet: 3).
- [S84] Family Search, (USA) (Troverdighet: 3).
"New York, New York City Births, 1846-1909," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:2WCB-DG8 : 11 February 2018), Nellie Elizabeth Butler, 25 Dec 1906; citing Manhattan, New York, New York, United States, reference 15987 New York Municipal Archives, New York; FHL microfilm 1,992,744.
- [S46] Ancestry.com, U.S., Social Security Death Index, 1935-2014 [database on-line]. Provo, UT, USA: Ancestry.com Operations Inc, 2014. (Troverdighet: 3).
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- [S124] Folketelling USA 01.04.1950 (Troverdighet: 3).
Seventeenth Census of the United States, 1950; Record Group: Records of the Bureau of the Census, 1790-2007; Record Group Number: 29; Residence Date: 1950; Home in 1950: Great Neck, Nassau, New York; Roll: 2329; Sheet Number: 21; Enumeration District: 30-486
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