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- [S1055] Slawson, James H. (I24419): 1870 US Census, (www.ancestry.com (2003): National Archives and Records Administration micropublication M593, roll 411, enumerated page 18, master page 131(B), line 32, dwelling 127, family 126; image accessed 1/7/2009.), 1870.IA.Mitchell.Cedar.18.
- [S1054] Slawson, James H. (I24419): 1880 US Census, (www.ancestry.com (2005): National Archives and Records Administration micropublication T9, roll 356, enumeration district (ED) 311, enumerated page 7C, master page 538C, line 2, dwelling 49, family 51; image accessed 1/7/2009.), 1880.IA.Mitchell.Rock.311.7.
- [S1048] Bisbee, Erwin C. (I24409): 1900 US Census, (www.ancestry.com (2004): National Archives and Records Administration micropublication T623, roll 424; enumeration district (ED) 30, sheet 5B, page 222B, line 100, dwelling 100, family 100; image accessed 12/21/2008.), 1900.IA.Clay.Meadow.30.10.
- [S1049] Bisbee, Erwin C. (I24409): 1910 US Census, (www.ancestry.com (2006): National Archives and Records Administration micropublication T624, roll 397; enumeration district (ED) 34, sheet 9B, page 192B, line 79, dwelling 170, family 173; image accessed 12/21/2008.), 1910.IA.Clay.Meadow.34.10.
- [S1047] Bisbee, Erwin C. (I24409): 1920 US Census, (www.ancestry.com (2005): National Archives and Records Administration micropublication T625, roll 483; enumeration district (ED) 38, sheet 11A, page 187A, line 46, dwelling 116, family 117; image accessed 12/21/2008.), 1920.IA.Clay.Meadow.38.11.
- [S1050] Bisbee, Cora E. (I24412): 1930 US Census, (www.ancestry.com (2002): National Archives and Records Administration micropublication T626, roll 648; enumeration district (ED) 17, sheet 7A, page 199A, line 49, dwelling 61, family 61; image accessed 12/21/2008.), 1930.IA.Clay.Meadow.17.13.
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