| Kilder |
- [S139] Folketelling USA 15.04.1910, Census Place: Bronx Assembly District 34, New York, New York; Roll: T624_1001; Page: 4A; Enumeration District: 1566; FHL microfilm: 1375014 (Troverdighet: 3).
- [S46] Ancestry.com, New York City Department of Records & Information Services; New York City, New York; New York City Birth Certificates; Borough: Bronx; Year: 1908 (Troverdighet: 3).
- [S46] Ancestry.com, New York State Department of Health; Albany, Ny, Usa; New York State Death Index. New York State, U.S., Death Index, 1957-1970 [database on-line]. Lehi, Utah, USA: Ancestry.com Operations, Inc., 2018. (Troverdighet: 3).
- [S156] Sagene ministerialbok 02 1880 - 1897. Sagene menighet, Oslo, I Ægteskab Indtraadte 1897. Side 183 - nr. 22. Jørgen Ludvigsen og Ragna Emilie Nilsen. (Troverdighet: 3).
- [S47] Folketelling Norge 03.12.1900, 0301 Kristiania kjøpstad (Troverdighet: 3).
https://www.digitalarkivet.no/pf01037045215521
- [S139] Folketelling USA 15.04.1910, Bronx Assembly District 34, New York, New York; Rulle: T624_1001; Sida: 4a; Räkningsdistrikt:: 1566; FHL-mikrofilm: 1375014 (Troverdighet: 3).
- [S46] Ancestry.com, New York, New York, U.S., Extracted Marriage Index, 1866-1937 [database on-line]. Provo, UT, USA: Ancestry.com Operations, Inc., 2014. (Troverdighet: 3).
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