| Sources |
- [S1366] Trass, John W. (I21086): 1870 US Census, (www.ancestry.com (2003): National Archives and Records Administration micropublication M593, roll 1; enumerated page 8, master page 496, line 20, dwelling 60, family 60; image downloaded 11/2/2008.), 1870-Mankato.4.jpg.
- [S1365] Trass, John W. (I21086): 1885 IA State Census, (www.ancestry.com: Iowa State Census Collection, 1836-1925 [database on-line]. Provo, UT, USA: The Generations Network, Inc., 2007; Roll IA1885_270, page 298, line 13, dwelling 77, family 81.).
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