| Sources |
- [S183] 1870 US Census, Grafton, Ozaukee Co., Wisconsin, Page 18.
- [S200] 1880 US Census, District 149, Grafton, Ozaukee Co., Wisconsin.
- [S192] 1860 US Census, Town of Grafton, Ozaukee Co., Wisconsin; p. 781; h.321 f.334; August Strassmann; 2 June 2010.
- [S329] Evangelische Kirche Plathe: Heydebreck - Taufen, Heiraten, Tote 1825-1837, 11 February 2012; Taufen 1825; Page 2; Record 8; Michael Friedrich August Strassman.
- [S200] 1880 US Census, District 149, Grafton, Ozaukee Co., Wisconsin, Page 23.
- [S192] 1860 US Census, Grafton, Ozaukee Co., Wisconsin, Page 45.
|