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- [S1520] Hecker, Emmett E. (I20602): 1910 US Census, (www.ancestry.com (2006): National Archives and Records Administration micropublication T624, roll 1332; enumeration district (ED) 10, sheet 6A, page 280, line 14, dwelling 146, family 149; image accessed 4/17/2009.), 1910.PA.Erie.Erie.10.11.
- [S1921] Hecker, Emmett E. (I20602): 1920 US Census, (www.ancestry.com (2005): National Archives and Records Administration micropublication T625, roll 1567; enumeration district (ED) 145, sheet 5B, page 239, line 81, dwelling 20, family 20; image accessed 4/17/2009.), 1920.PA.Erie.Washington.145.10.
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