| Kilder |
- [S2] Tvedestrand ministerialbok A 01 1885 - 1916. Tvedestrand sokn, Tvedestrand prgj, Aust-Agder, Levende fødte 1912. Side 106 - nr. 10. Marta Karoline. (Troverdighet: 3).
- [S46] Ancestry.com, New York, New York, U.S., Death Index, 1949-1965 [database on-line]. Lehi, UT, USA: Ancestry.com Operations, Inc., 2017. (Troverdighet: 3).
- [S46] Ancestry.com, Web: Brooklyn, New York, U.S., Green-Wood Cemetery Burial Index [database on-line]. Provo, UT, USA: Ancestry.com Operations, Inc., 2011. (Troverdighet: 3).
- [S32] Avis, The Baltimore Sun BALTIMORE, MARYLAND Sunday, May 1, 1904 (Troverdighet: 3).
- [S82] Folketelling USA 05.01.1920, Census Place: Brooklyn Assembly District 12, Kings, New York; Roll: T625_1163; Page: 16B; Enumeration District: 718 (Troverdighet: 3).
- [S46] Ancestry.com, 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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