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- [S64] Missouri Bureau of Vital Records, Missouri Secretary of State, Missouri -- Death Certificates 1910-1974, (https://s1.sos.mo.gov/Records/Archives/ArchivesMvc/ :n.d.), 3 May 2018, death certificate no. 12360 (1928), Carl Frederick Trachsel, accessed 3 May 2018.
- [S64] Missouri Bureau of Vital Records, Missouri Secretary of State, Missouri -- Death Certificates 1910-1974, (https://s1.sos.mo.gov/Records/Archives/ArchivesMvc/ :n.d.), 3 May 2018, death certificate no. 23750 (1911), Mary Bessie Trachsel, accessed 3 May 2018.
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