↑ "United States Social Security Death Index," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:JP39-RMK : 20 May 2014), Richard L Bradbury, 27 Feb 1993; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing).
"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XMDW-F26 : accessed 17 December 2018), Richard Bradberry in household of Irving Bradberry, Carmel, Penobscot, Maine, United States; citing enumeration district (ED) ED 28, sheet 2B, line 58, family 10, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 837; FHL microfilm 2,340,572.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KMMG-QX9 : 16 March 2018), Richard Bradbury in household of Irving Bradbury, Burlington, Burlington Town, Penobscot, Maine, United States; citing enumeration district (ED) 10-41, sheet 4A, line 6, family 64, 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 1487.
It may be possible to confirm family relationships with Richard by comparing test results with other carriers of his ancestors' Y-chromosome or mitochondrial DNA.
However, there are no known yDNA or mtDNA test-takers in his direct paternal or maternal line.
It is likely that these autosomal DNA test-takers will share DNA with Richard: