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- [S1867] Hatch, Orval C: Obit (Union City), (Public Library, Union City, Pennsylvania, online at ).
- [S1159] Hatch, Orval C. (I17678): 1920 US Census, (www.ancestry.com (2005): National Archives and Records Administration micropublication T625, roll 1567, enumeration district (ED) 141, sheet 12A, page 204A, line 20, dwelling 279#, family 292; image accessed 12/30/2008.), 1920.PA.Erie.Union City Ward 2.141.23.
- [S1160] Hatch, Orval C. (I17678): 1930 US Census, (www.ancestry.com (2002): National Archives and Records Administration micropublication T626, roll 2038, enumeration district (ED) 140, sheet 10A, page 172A, line 23, dwelling 88, family 97; image accessed 12/30/2008.), 1930.PA.Erie.Union.140.19.
- [S1158] Hatch, Orval C. (I17678): 1910 US Census, (www.ancestry.com (2006): National Archives and Records Administration micropublication T624, roll 1343, enumeration district (ED) 133, sheet 5A, page 140A, line 46, dwelling 118, family 119; image accessed 12/30/2008.), 1910.PA.Erie.Union Ward2.133.9.
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