| Sources |
- [S22741] Descendants of Squire Hascall and Elizabeth Chandler/Russell, (compiled by Richard K. Hascall for the Haskell Family Association).
- [S36534] 1930 census, California, Los Angeles county.
- [S82691] Birth index, California, Donald E. Walker.
- [S53585] SSDI: Social Security Death Index.
- [S14410] Death index, California, Donald Ellsworth Walker.
- [S40391] Obituary, The Orange County Register (Santa Ana, CA), Donald Ellsworth Walker, (July 26, 1995).
- [S17267] 1910 census, California, Los Angeles county.
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