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- [S1759] Pennsylvania. Bradford.
- [S2453] 1930 U.S. Federal Population Census, Bradford, McKean Co., PA.
- [S1760] John Joseph, Jr. Dudick Crawford Dr., Columbus, Ohio interviewed by Linda Coate Dudick 1978- In Linda Coate files (D-7).
- [S1135] Ancestry.com, 1940 United States Federal Census, (Name: Ancestry.com Operations, Inc. Date:2012 Place:Provo, UT, USA;), Year: 1940; Census Place: Bradford, McKean, Pennsylvania; Roll: m-t0627-03568; Page: 3B; Enumeration District: 42-4, 1,2442::0.
- [S21] Ancestry.com, U.S., Find a Grave Index, 1600s-Current, (Name: Ancestry.com Operations, Inc.; Location: Lehi, UT, USA; Date: 2012;).
- [S240] 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: Bradford, McKean, Pennsylvania; Roll: 1169; Page: 21; Enumeration District: 42-9.
- [S292] Ancestry.com, U.S., Obituary Collection, 1930-Current, (Name: Ancestry.com Operations Inc; Location: Lehi, UT, USA; Date: 2006;), Publication Date: 9/ Dec/ 2012; Publication Place: Bradford, Pennsylvania, USA; URL: http://www.legacy.com/obituaries/bradfordera/obituary.aspx?n=louise-dudick&pid=161424949.
http://www.legacy.com/obituaries/bradfordera/obituary.aspx?n=louise-dudick&pid=161424949
- [S426] Ancestry.com, U.S., Find a Grave Index, 1600s-Current, (Name: Ancestry.com Operations, Inc. Date:2012 Place:Lehi, UT, USA;), 1,60525::0.
- [S2609] The Bradford Era (www.ancestry.com).
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