John J. Hart
Ancestry.com
- John Hart - Overview & Tombstone
- 1900 United States Federal Census
- 1910 United States Federal Census
- U.S., World War I Draft Registration Cards, 1917-1918 for John Joseph Hart
- 1920 United States Federal Census
- U.S. City Directories, 1822-1989 (Toledo, Ohio, 1928)
- 1930 United States Federal Census
- 1940 United States Federal Census
