↑ "United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MHMJ-LCP : 19 February 2021), Charles E Frost in household of Samuel A Frost, Van Buren, Clay, Indiana, United States; citing enumeration district ED 224, sheet 320A, NARA microfilm publication T9 (Washington, D.C.: National Archives and Records Administration, n.d.), FHL microfilm 1,254,269.
↑ "New York State Census, 1925," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:KSSJ-2BR : 8 November 2014), Charles E Frost, Brooklyn, A.D. 01, E.D. 32, Kings, New York, United States; records extracted by Ancestry and images digitized by FamilySearch; citing p. 24, line 01, New York State Archives, Albany. 1925 New York Bethel
↑ "United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:X765-44S : accessed 15 August 2021), Charles E Frost, Brooklyn (Districts 0751-1000), Kings, New York, United States; citing enumeration district (ED) ED 905, sheet 4A, line 11, family , NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 1491; FHL microfilm 2,341,226. 1930 New York Bethel
↑ "United States Census, 1940," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:KQ1N-MVL : 7 January 2021), C E Frost, Brooklyn, New York City, New York, United States; citing enumeration district (ED) 24-10A, sheet 84B, line 46, family , 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 2547. 1940 New York Bethel