"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M6QG-V7Y : accessed 13 April 2020), Elmer E Dixon in household of Guy Dixon, Johnsville, Frederick, Maryland, United States; citing ED 85, sheet 1A, line 42, family 12, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 673; FHL microfilm 1,820,673.
"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:X34J-5T2 : accessed 13 April 2020), Elmer Dixon in household of Guy Dixon, Johnsville, Frederick, Maryland, United States; citing enumeration district (ED) ED 40, sheet 4A, line 31, family 89, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 874; FHL microfilm 2,340,609.