| Sources |
- [S45887] 1940 census, California, Alameda county, Year: 1940; Census Place: Oakland, Alameda, California; Roll: m-t0627-00443; Page: 3A; Enumeration District: 61-99 (Reliability: 3).
- [S60752] Cemetery index, Memory Gardens Cemetery, Concord, Contra Costa, California, (Find-a-Grave).
- [S53634] Death index, California, (Ancestry.com. California, Death Index), Name: Emily C Blackwell Social Security #: 545014242 Gender: Female Birth Date: 30 Nov 1895 Birth Place: California Death Date: 1 Jan 1974 Death Place: Contra Costa (Reliability: 3).
|