| Sources |
- [S26] Probate record of Ernest Hafeman.
- [S112] Death Certificate, Walter Hafeman, Dade County, FL.
- [S-2107799078] Probate record of Ernest Hafeman.
- [S1] 1920 Census, (Online publication - Provo, UT, USA: MyFamily.com, Inc., 2005. For details on the contents of the film numbers, visit the following NARA web page: NARA. Note: Enumeration Districts 819-839 on roll 323 (Chicago City.Original data - United States of America), Year: 1920; Census Place: Freehold, Monmouth, New Jersey; Roll: T625_1058; Page: 2A; Enumeration District: 102; Image: 643.
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