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- [S138] Ancestry.com, Website: Find A Grave Index, 1600s-Current, (Ancestry.com Operations, Inc.) (Reliability: 0).
- [S116] Ancestry.com, 1920 United States Federal Census, (Ancestry.com Operations, Inc.), Year: 1920; Census Place: Paxtang, Dauphin, Pennsylvania; Roll: T625_1559; Page: 2B; Enumeration District: 127 (Reliability: 0).
- [S209] Ancestry.com, 1910 United States Federal Census, (Ancestry.com Operations Inc), Year: 1910; Census Place: Harrisburg Ward 2, Dauphin, Pennsylvania; Roll: T624_1336; Page: 18B; Enumeration District: 0057; FHL microfilm: 1375349 (Reliability: 0).
- [S193] Ancestry.com, 1930 United States Federal Census, (Ancestry.com Operations Inc), Year: 1930; Census Place: Penbrook, Dauphin, Pennsylvania; Page: 5B; Enumeration District: 0088; FHL microfilm: 2341762 (Reliability: 0).
- [S26] Ancestry.com, Pennsylvania, Birth Records, 1906-1908, (Ancestry.com Operations, Inc.), Pennsylvania Historical and Museum Commission; Harrisburg, Pennsylvania; Box Number: 335; Certificate Number: 118069 (Reliability: 0).
- [S191] Ancestry.com, 1940 United States Federal Census, (Ancestry.com Operations, Inc.), Year: 1940; Census Place: Penbrook, Dauphin, Pennsylvania; Roll: m-t0627-03484; Page: 7A; Enumeration District: 22-105 (Reliability: 0).
- [S64] Website: Find a Grave [text], https://www.findagrave.com/memorial/155175969/barbara-m-hackman.
- [S164] Ancestry.com, Pennsylvania, Marriages, 1852-1968, (Ancestry.com Operations, Inc.) (Reliability: 0).
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