| Quellen |
- [S2176] U.S., Social Security Applications and Claims Index, 1936-2007.
- [S30] 1940 United States Federal Census, Year: 1940; Census Place: Chicago, Cook, Illinois; Roll: m-t0627-01010; Page: 6B; Enumeration District: 103-2818.
- [S314] Erfurt, Germany, Births, 1874-1901, Stadtarchiv Erfurt; Erfurt, Deutschland; Personenstandsregister Geburtsregister.
- [S39] U.S., Social Security Death Index, 1935-2014, Number: 320-46-5317; Issue State: Illinois; Issue Date: 1967.
- [S41] 1930 United States Federal Census, Year: 1930; Census Place: Chicago, Cook, Illinois; Page: 14B; Enumeration District: 1644; FHL microfilm: 2340221.
- [S506] Illinois, Federal Naturalization Records, 1856-1991, National Archives at Chicago; Chicago, Illinois; ARC Title: Illinois, Petitions for Naturalization, 1906-1991; NAI Number: 593882; Record Group Title: Records of District Courts of the United States, 1685-2009; Record Group Number: RG 21.
- [S507] Northern District, Illinois, Naturalization Index, 1926-1979.
- [S93] Hamburg Passenger Lists, 1850-1934, Staatsarchiv Hamburg; Hamburg, Deutschland; Hamburger Passagierlisten; Microfilm No.: k_1850.
- [S754] Erfurt, Germany, Births, 1874-1901, Stadtarchiv Erfurt; Erfurt, Deutschland; Personenstandsregister Geburtsregister.
- [S741] 1930 United States Federal Census, Year: 1930; Census Place: Chicago, Cook, Illinois; Page: 14B; Enumeration District: 1644; FHL microfilm: 2340221.
- [S739] 1940 United States Federal Census, Year: 1940; Census Place: Chicago, Cook, Illinois; Roll: m-t0627-01010; Page: 6B; Enumeration District: 103-2818.
- [S2184] Hamburg Passenger Lists, 1850-1934, Staatsarchiv Hamburg; Hamburg, Deutschland; Hamburger Passagierlisten; Microfilm No.: k_1850.
- [S759] Northern District, Illinois, Naturalization Index, 1926-1979.
- [S47] New York, Passenger and Crew Lists (including Castle Garden and Ellis Island), 1820-1957, Year: 1923; Arrival: New York, New York; Microfilm Serial: T715, 1897-1957; Microfilm Roll: Roll 3357; Line: 5; Page Number: 80.
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