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- [S16] 1920 United States Federal Census, Ancestry.com, (Name: Ancestry.com Operations, Inc.; Location: Provo, UT, USA; Date: 2010;), Database online. Year: 1920; Census Place: Spring Creek, Pennington, South Dakota; Roll: T625_1725; Page: 2A; Enumeration District: 158; Image: 711.
Record for Edward H Mc Mahon
- [S1] 1930 United States Federal Census, Ancestry.com, (Name: Ancestry.com Operations Inc; Location: Provo, UT, USA; Date: 2002;), Database online. Year: 1930; Census Place: Spring Creek, Pennington, South Dakota; Roll: 2229; Page: 1A; Enumeration District: 28; Image: 922.0.
Record for Edward H Mc Mahon
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