Devine, Lester. "Caldwell, Robert Archibald (1879–1966) and Mary (Schowe) (c. 1879–1954)." Encyclopedia of Seventh-day Adventists. January 29, 2020. Date of access April 02, 2020, https://phpstack-867666-4365254.cloudwaysapps.com/article?id=C7TZ.