 1900 United States Federal Census |
| 1910 United States Federal Census |
| 1920 United States Federal Census |
| 1940 United States Federal Census |
| Minnesota, Death Index, 1908-2002 |
| Social Security Death Index |
| South Dakota, Marriages, 1905-2013 |
| South Dakota, State Census, 1905 |
| South Dakota, State Census, 1945 |
| U.S., Find A Grave Index, 1600s-Current |
| World War I Draft Registration Cards, 1917-1918 |
Charles Lewis Delaware