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- [S118] 1910 Federal Census, Record Type: Census, (Name: April 16, 1910;), 1910; Census Place: Cincinnati Ward 24, Hamilton, Ohio; Roll: T624_1194; Page: 2B; Enumeration District: 281; Image: 1093.
- [S121] 1930 Federal Census, Record Type: Federal Census, (Name: 1930;), 1930; Census Place: Cincinnati, Hamilton, Ohio; Roll: 1815; Page: 7A; Enumeration District: 240; Image: 47.0.
- [S124] Ohio Department of Health. Index to Annual Deaths, 1958-2000, James P Gagan Birth Date: Est. 1908 Gender: Male Race: White Residence City: Cincinnati Residence County: Hamilton Residence State: Ohio Residence Country: United States Death Date: 14 Jun 1970 Hospital of Death: Good Samaritan Hospital City of Death: Cinc.
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