"United States Census, 1870," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M4X6-VQZ : accessed 4 February 2016), Charles C Parks in household of William Parks, Missouri, United States; citing p. , family 163, NARA microfilm publication M593 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 552,267.
"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M66G-8B6 : accessed 4 February 2016), Charles C Parks in household of William J Parks, Keytesville, Chariton, Missouri, United States; citing enumeration district ED 167, sheet 495C, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 0680; FHL microfilm 1,254,680.
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M3C7-GLD : accessed 10 February 2016), Chas C Parks, Keytesville Township Keytesville city, Chariton, Missouri, United States; citing sheet 12A, family 225, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,240,847.
"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M84M-HHK : accessed 10 February 2016), Charles C Parks, Keytesville, Chariton, Missouri, United States; citing sheet 4B, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,820,906.