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- [S1364] Trass, John W. (I21086): 1860 US Census, (www.ancestry.com (2004): National Archives and Records Administration micropublication M653, roll 575; enumerated page 36, line 39, dwelling 316, family 297; image downloaded 11/2/2008.), 1860-Orion.2.jpg.
- [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.
- [S1367] Trass, John W. (I21086): 1880 US Census, (www.ancestry.com (2005): National Archives and Records Administration micropublication T9, roll 615; enumeration district (ED) 20, enumerated page #, master page 478C, line 28, dwelling 207, family 216; image downloaded 11/2/2008.), 1880-Mankato.20.20.jpg.
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