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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.), death certificate no. 2663 (1911), Christina Gross, accessed 15 January 2016. (Reliability: 2).
- [S257] Missouri, DeKalb County, 1870 U.S. Census Population Schedule, Missouri, DeKalb County, (https://www.familysearch.org/search/collection/1438024: National Archives and Records Administration, 2016), M593, Washington Twp., Stewartsville, p. 32 (penned) 535 (stamped), dwelling 235, family 236, Isadore Gross, accessed 17 July 2018 (Reliability: 2).
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