| 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. 28588 (1935), Bertha Yenni, accessed 7 May 2018. (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. 19293 (1937), Christian Yenni, accessed 7 May 2018. (Reliability: 2).
- [S97] Department of Public Health Services, Sacramento, California -- Death Index 1940-1997, ((https://familysearch.org/search/collection/2015582 : 2014)), accessed 11 May 2018), Lallah I. Buetzberger. (Reliability: 2).
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