"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KWSR-SNP : accessed 7 February 2018), Roy L Phelps in household of Conrad Phelps, Clemmonsville, Clemonsville Township, Forsyth, North Carolina, United States; citing enumeration district (ED) 34-9, sheet 5B, line 46, family 91, 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 2907.
"United States, GenealogyBank Obituaries, 1980-2014," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QVYC-S7SD : accessed 7 February 2018), Roy L Phelps Sr in entry for Mrs Helen Louise Phelps Matthews, North Carolina, United States, 19 Sep 2002; from "Recent Newspaper Obituaries (1977 - Today)," database, GenealogyBank.com (http://www.genealogybank.com : 2014); citing Winston-Salem Journal, born-digital text.
"North Carolina, Center for Health Statistics, Vital Records Unit, County Birth Records, 1913-1922", database, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:ZG16-ZPW2 : 9 June 2020), Roy Leonard Phelps, 1922.