| Sources |
- [S72039] Obituary, Salem Evening News, Harold V. Langmaid, (January 14, 1970).
- [S53737] Birth index, Massachusetts, Name: Richard Pickering Langmaid Birth Date: 1929 Birth Place: Marblehead, Massachusetts, USA Volume Number: 62 Page Number: 266 Index Volume Number: 120 Reference Number: F63.M362 v.120 (Reliability: 3).
- [S39643] 1930 census, Massachusetts, Essex county, Year: 1930; Census Place: Marblehead, Essex, Massachusetts; Page: 17B; Enumeration District: 0193 (Reliability: 3).
- [S53634] Death index, California, (Ancestry.com. California, Death Index), Name: Richard P Langmaid Social Security #: 015228320 Gender: Male Birth Date: 7 Oct 1929 Birth Place: Massachusetts Death Date: 21 Mar 1994 Death Place: Alameda Mother's Maiden Name: Pickering (Reliability: 3).
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