"United States Census, 1910," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/ML66-Y3K : accessed 17 March 2015), Ralph Koontz, Mansfield Ward 4, Richland, Ohio, United States; citing enumeration district (ED) 189, sheet 9A, family 220, NARA microfilm publication T624 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,375,238.
"United States World War I Draft Registration Cards, 1917-1918," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/K6NQ-S6W : accessed 17 March 2015), Ralph William Koontz, 1917-1918; citing Richland County, Ohio, United States, NARA microfilm publication M1509 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,851,086.
"United States Census, 1920," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/M6MS-8S8 : accessed 17 March 2015), Ralph Koontz in household of Roy Ernsberger, Mansfield Ward 4, Richland, Ohio, United States; citing sheet 6B, family 114, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,821,430.
"United States Census, 1930," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/X4WV-Y83 : accessed 17 March 2015), Ralph W Koontz in household of Charles H Frederick, Willard, Huron, Ohio, United States; citing enumeration district (ED) 0013, sheet 8B, family 225, line 90, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 1823; FHL microfilm 2,341,557.
"United States Census, 1940," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/V1TY-QYH : accessed 17 March 2015), Ralph Koontz, Area A, Hammond, North Township, Lake, Indiana, United States; citing enumeration district (ED) 45-99, sheet 11A, family 240, NARA digital publication T627 (Washington, D.C.: National Archives and Records Administration, 2012), roll 1067.
"United States World War II Draft Registration Cards, 1942," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/X5VY-Q3K : accessed 17 March 2015), Ralph Wm Koontz, 1942; citing NAID identifier 623285, NARA microfilm publication M1936, M1937, M1939, M1951, M1962, M1964, M1986, M2090, and M2097 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 2,283,027.