United States Census, 1930," database with images, FamilySearch(https://familysearch.org/ark:/61903/1:1:X39C-4BP : accessed 7 October 2020), Barbara Coombs in household of William Coombs, Rockford, Winnebago, Illinois, United States; citing enumeration district (ED) ED 37, sheet 2A, line 47, family 27, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 571; FHL microfilm 2,340,306.
United States Census, 1940," database with images, FamilySearch(https://familysearch.org/ark:/61903/1:1:V1YF-ZRW : 20 November 2019), Barbara Coombs in household of William Coombs, Ward 3, Crawfordsville, Union Township, Montgomery, Indiana, United States; citing enumeration district (ED) 54-23, sheet 10B, line 69, family 256, Sixteenth Census of the United States, 1940, NARA digital publication T627. Records of the Bureau of the Census, 1790 - 2007, RG 29. Washington, D.C.: National Archives and Records Administration, 2012, roll 1080.
“Indiana Marriages, 1811-2007", database with images, FamilySearch(https://www.familysearch.org/ark:/61903/1:1:WT7R-JVW2 : 7 August 2020), Barbara A Coombs in entry for David P Beecher, 1946.