Facts and Events
- ↑ Amelia Earhart, in Wikipedia: The Free Encyclopedia.
- ↑ 1920 to June 4, 1935, Record Type: newspaper clippings, Subject: Ruth Martin Tonsing and relatives, 158, Saturday, February 7, 1931.
- ↑ Martin, Ruth Margaret Mellenbruch. Family tree--Challis Harres Martin Tonsing Otis. (Fort Worth, Texas, USA: Paul Martin Tonsing, 1979), 90.