"United States Census, 1900," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:MMLY-FPX : accessed 21 July 2023), Frank L Thayer in household of Fred C Thayer, Hampden town (south part), Penobscot, Maine, United States; citing enumeration district (ED) 107, sheet , family , NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm .
"Maine Vital Records, 1670-1921," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KCDT-2R7 : 2 March 2021), Frank Thayer and Gertie J Light, 13 May 1906; citing Hermon, , Maine, United States, multiple sources, Maine; FHL microfilm.
Find a Grave, database and images (https://www.findagrave.com/memorial/41412159/frank-l-thayer: accessed 21 July 2023), memorial page for Frank L. Thayer (23 Jul 1885–Sep 1965), Find a Grave Memorial ID 41412159, citing Pine Grove Cemetery, Bangor, Penobscot County, Maine, USA; Maintained by Marc Thayer, III (contributor 46542959).
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