| Sources |
- [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.), death certificate no. 15632 (1956), John H. Karl, accessed 10 February 2016. (Reliability: 2).
- [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.), death certificate no. 22015 (1930), Mary E. Karl, accessed 10 February 2016. (Reliability: 2).
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