"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M3MH-VQ9 : accessed 4 July 2021), Adam Donald in household of John Donald, Millvale borough Ward 2, Allegheny, Pennsylvania, United States; citing enumeration district (ED) 451, sheet 16A, family 296, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,241,369.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MGQ7-Y42 : accessed 4 July 2021), Adam Donald in household of John Donald, Millvale Ward 3, Allegheny, Pennsylvania, United States; citing enumeration district (ED) ED 164, sheet 7B, family 160, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 1296; FHL microfilm 1,375,309.
"United States World War I Draft Registration Cards, 1917-1918", database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KXYW-T75 : 23 February 2021), Adam Donald, 1917-1918.
"New York, U.S., Abstracts of World War I Military Service, 1917-1919", database w/images (https://www.ancestry.com/ : accessed 17 Apr 2021) New York State Abstracts of World War I Military Service, 1917–1919. Adjutant General's Office. Series B0808. New York State Archives, Albany, New York. Ancestry Record 3030 #115854 Name: Adam Donald Birth Place: Millvale, Pennsylvania Birth Date: 1 May 1896 Service Start Date: 24 Jun 1918 Service Start Place: New York City, New York Service Start Age: 22 Ancestry Sharing Image (free)
"United States, Veterans Administration Master Index, 1917-1940," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:QP8V-7NSW : 27 October 2019), Adam Donald, 13 Jun 1919; citing Military Service, NARA microfilm publication 76193916 (St. Louis: National Archives and Records Administration, 1985), various roll numbers.
"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XS54-QXJ : accessed 4 July 2021), Adam Donald, Chicago (Districts 1501-1750), Cook, Illinois, United States; citing enumeration district (ED) ED 1661, sheet 1A, line 11, family 5, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 486; FHL microfilm 2,340,221.
"United States Census, 1940," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:KQ1J-958 : 7 January 2021), Adam Donald in household of John Donald, Brooklyn, New York City, New York, United States; citing enumeration district (ED) 24-37A, sheet 5B, line 68, family 221, 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.
"Texas, Matagorda County, School Census Records, 1923-1946," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:Q2Q1-SX7D : accessed 4 July 2021), Adam Donald in entry for Phyllis Donald, 1941; citing School enrollment, State Board of Education. Matagorda County Judge, Bay City.
"United States World War II Draft Registration Cards, 1942," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:V1VY-XQB : 13 March 2020), Adam Donald, 1942; citing NARA microfilm publication M1936, M1937, M1939, M1951, M1962, M1964, M1986, M2090, and M2097 (Washington D.C.: National Archives and Records Administration, n.d.).
"Virginia, Marriage Certificates, 1936-1988," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QV17-4DTQ : 20 February 2021), Adam Donald in entry for Gregory Edgar Doyle and Phyllis Donald Chestnutt, 06 Jan 1977; from "Virginia, Marriage Records, 1700-1850," database and images, Ancestry (http://www.ancestry.com : 2012); citing Fairfax, , Virginia, United States, certificate 77-001658, Virginia Department of Health, Richmond.
"Virginia, Death Certificates, 1912-1987," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QVRH-6KH1 : 16 August 2019), Adam Donald, 23 Dec 1979; from "Virginia, Marriage Records, 1700-1850," database and images, Ancestry (http://www.ancestry.com : 2012); citing Alexandria, , Virginia, United States, entry #, Virginia Department of Health, Richmond.
"United States Social Security Death Index," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:JK59-YZG : 7 January 2021), Adam Donald, Dec 1979; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing).