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- [S2775] Ancestry.com, U.S., Find A Grave Index, 1600s-Current, (Name: Ancestry.com Operations, Inc.; Location: Provo, UT, USA; Date: 2012;).
Record for Harold Hassell Montgomery
https://search.ancestry.com/cgi-bin/sse.dll?db=60525&h=6845820&indiv=try
- [S2772] Ancestry.com, 1910 United States Federal Census, (Name: Ancestry.com Operations Inc; Location: Provo, UT, USA; Date: 2006;), Year: 1910; Census Place: Mount Auburn, Christian, Illinois; Roll: T624_234; Page: 1a; Enumeration District: 0013; FHL microfilm: 1374247.
Record for Harold H Montgomery
https://search.ancestry.com/cgi-bin/sse.dll?db=7884&h=4319487&indiv=try
- [S2774] Ancestry.com, 1930 United States Federal Census, (Name: Ancestry.com Operations Inc; Location: Provo, UT, USA; Date: 2002;), Year: 1930; Census Place: Detroit, Wayne, Michigan; Page: 5B; Enumeration District: 0793; FHL microfilm: 2340798.
Record for Harold H Montgomery
https://search.ancestry.com/cgi-bin/sse.dll?db=6224&h=12943974&indiv=try
- [S4362] Ancestry.com, 1950 United States Federal Census, (Name: Ancestry.com Operations, Inc.; Location: Lehi, UT, USA; Date: 2022;), National Archives at Washington, DC; Washington, D.C.; Seventeenth Census of the United States, 1950; Year: 1950; Census Place: Armada, Macomb, Michigan; Roll: 5461; Page: 4; Enumeration District: 50-2.
Record for Harold H Montgomery
https://search.ancestry.com/cgi-bin/sse.dll?db=62308&h=176767751&indiv=try
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