| Sources |
- [S259] Missouri., Missouri, Saint Louis County -- The St. Louis Post-Dispatch Newspaper (Newspapers.com), 16 Aug 2018, "Helen Anna Callahan," 9 August 1992, p. 5B, col. 3; digital images : accessed 15 August 2018). (Reliability: 2).
- [S64] Missouri Bureau of Vital Records, Missouri Secretary of State, Missouri -- Death Certificates 1910-1975, (https://s1.sos.mo.gov/Records/Archives/ArchivesMvc/ :n.d.), 18 Aug 2018, death certificate no. 0046842 (1964), Stanley F. Frost, accessed 18 August 2018. (Reliability: 2).
|