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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 Harry Edgar Montgomery
https://search.ancestry.com/cgi-bin/sse.dll?db=60525&h=26412303&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: Rochester, Sangamon, Illinois; Page: 1A; Enumeration District: 0082; FHL microfilm: 2340293.
Record for Harry E Montgomery
https://search.ancestry.com/cgi-bin/sse.dll?db=6224&h=87623411&indiv=try
- [S2780] Ancestry.com, 1940 United States Federal Census, (Name: Online publication - Provo, UT, USA: Ancestry.com Operations, Inc., 2012.Original data - United States of America, Bureau of the Census. Sixteenth Census of the United States, 1940. Washington, D.C.: National Archives and Records Administration, 1940. T627;), Year: 1940; Census Place: Rochester, Sangamon, Illinois; Roll: m-t0627-00887; Page: 1A; Enumeration District: 84-96.
Record for Harry Montgomery
https://search.ancestry.com/cgi-bin/sse.dll?db=2442&h=142086560&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: Rochester, Sangamon, Illinois; Roll: 127; Page: 9; Enumeration District: 84-45.
Record for Harry Montgomery
https://search.ancestry.com/cgi-bin/sse.dll?db=62308&h=224943166&indiv=try
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