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- [S130] Ancestry.com, U.S., Find A Grave Index, 1600s-Current, (Name: Ancestry.com Operations, Inc.; Location: Provo, UT, USA; Date: 2012;).
Record for John F. Calvin
https://search.ancestry.com/cgi-bin/sse.dll?db=60525&h=96061959&indiv=try
- [S631] Ancestry.com, 1930 United States Federal Census, (Name: Ancestry.com Operations Inc; Location: Provo, UT, USA; Date: 2002;), Year: 1930; Census Place: Beaver, Mahoning, Ohio; Page: 2A; Enumeration District: 0096; FHL microfilm: 2341575.
Record for John F Calvin
https://search.ancestry.com/cgi-bin/sse.dll?db=6224&h=70817666&indiv=try
- [S436] Ancestry.com, 1910 United States Federal Census, (Name: Ancestry.com Operations Inc; Location: Provo, UT, USA; Date: 2006;), Year: 1910; Census Place: Fairfield, Columbiana, Ohio; Roll: T624_1161; Page: 5A; Enumeration District: 0011; FHL microfilm: 1375174.
Record for John S Calvin
https://search.ancestry.com/cgi-bin/sse.dll?db=7884&h=21263309&indiv=try
- [S614] Ancestry.com, 1940 United States Federal Census, (Name: Ancestry.com Operations, Inc.; Location: Provo, UT, USA; Date: 2012;), Year: 1940; Census Place: Green, Mahoning, Ohio; Roll: m-t0627-03109; Page: 14A; Enumeration District: 50-41.
Record for Lois G Black
https://search.ancestry.com/cgi-bin/sse.dll?db=2442&h=29930643&indiv=try
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