"United States World War I Draft Registration Cards, 1917-1918," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K6DT-V46 : accessed 7 January 2016), Clarence Mccormick, 1917-1918; citing Mercer County, Illinois, United States, NARA microfilm publication M1509 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,614,406.
"United States World War II Draft Registration Cards, 1942," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:V1KH-WJT : accessed 7 January 2016), Clarence Mccormick, 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.).
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MSHH-J8M : accessed 7 January 2016), Clarence J Mccormick in household of Emanael Mccormick, Drury Township, Rock Island, Illinois, United States; citing sheet 3A, family 57, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,240,338.
"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MJ4Q-TJK : accessed 7 January 2016), Clarence Mccormick, Biggsville, Henderson, Illinois, United States; citing sheet 3A, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,820,372.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KWH4-72T : accessed 7 January 2016), Clarence Mccormick, Biggsville Township, Henderson, Illinois, United States; citing enumeration district (ED) 36-3, sheet 4B, family 92, NARA digital publication T627 (Washington, D.C.: National Archives and Records Administration, 2012), roll 811.
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