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- [S3640] Ancestry.com, 1920 United States Federal Census, (Name: Ancestry.com Operations, Inc.; Location: Provo, UT, USA; Date: 2010;), Year: 1920; Census Place: Chickasha Ward 4, Grady, Oklahoma; Roll: T625_1461; Page: 14B; Enumeration District: 172.
Record for Harry Hammerly
https://search.ancestry.com/cgi-bin/sse.dll?db=6061&h=105093256&indiv=try
- [S3770] 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: Chickasha, Grady, Oklahoma; Roll: m-t0627-03295; Page: 15B; Enumeration District: 26-14.
Record for Harry Hammerly
https://search.ancestry.com/cgi-bin/sse.dll?db=2442&h=87296583&indiv=try
- [S3450] Ancestry.com, U.S. City Directories, 1821-1989, (Name: Ancestry.com Operations, Inc.; Location: Provo, UT, USA; Date: 2011;).
Record for Harry Hammerly
https://search.ancestry.com/cgi-bin/sse.dll?db=2469&h=957555577&indiv=try
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