| Sources |
- [S78226] Birth certificate, Arizona, James Donald Haskell.
- [S53634] Death index, California, (Ancestry.com. California, Death Index), Name: Opal Elizabeth Haskell [Opal Elizabeth Zimmerman] Social Security #: 527123446 Gender: Female Birth Date: 8 Sep 1918 Birth Place: Ohio Death Date: 13 Jul 1985 Death Place: Stanislaus Mother's Maiden Name: Boydston Father's Surname: Zimmer (Reliability: 3).
- [S53077] Cemetery index, Turlock Memorial Park, Turlock, Stanislaus, California, (Find-a-Grave).
- [S54664] Marriage record, Arizona, Name: Paul Haskell Marriage Date: 12 Dec 1933 Marriage Place: Maricopa, Arizona , USA Spouse: Opal Zimmerman Description: Marriage Licenses (Reliability: 3).
- [S54664] Marriage record, Arizona, Name: Opal Haskell Gender: Female Marriage Age: 18 Birth Date: abt 1919 Marriage Date: 16 Jun 1937 Marriage Place: Pinal, Arizona , USA Spouse: Paul R. Haskell (Reliability: 3).
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