From FamilySearch.org
http://search.ancestry.com/collections/60901/records/9243674
Year: 1940; Census Place: Mooreland, Woodward, Oklahoma; Roll: T627_3341; Page: 4A; Enumeration District: 77-10
http://search.ancestry.com/collections/2442/records/96208094
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:VB2M-JYY : 29 February 2020), James I Wheelock, Mooreland Township, Woodward, Oklahoma, United States; citing enumeration district (ED) 77-10, sheet 4A, line 9, family 67, 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 3341.
Year: 1910; Census Place: Mooreland, Woodward, Oklahoma; Roll: T624_1276; Page: 10B; Enumeration District: 0286; FHL microfilm: 1375289
http://search.ancestry.com/collections/7884/records/23206781
"Oklahoma, School Records, 1895-1936," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:7BV6-S4ZM : 8 May 2019), J I Wheelock in entry for Irvin Wheelock, 1918-1920; citing School Enrollment, Mooreland, Woodward, Oklahoma, United States, multiple County Clerk offices, Oklahoma school district offices, Oklahoma; FHL microfilm 1,650,955.
"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MFDF-HN6 : 29 July 2017), Irvin Wheelock in household of Maggie Wheelock, Precinct 10, Douglas, Colorado, United States; citing enumeration district ED 38, sheet 345B, NARA microfilm publication T9 (Washington, D.C.: National Archives and Records Administration, n.d.), FHL microfilm 1,254,090.
Ancestry Family Tree
Year: 1920; Census Place: Mooreland, Woodward, Oklahoma; Roll: T625_1489; Page: 4A; Enumeration District: 228; Image: 860
http://search.ancestry.com/collections/6061/records/49547430
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MLWW-8VH : accessed 20 March 2020), James Whelock, Mooreland, Woodward, Oklahoma, United States; citing enumeration district (ED) ED 286, sheet 10B, family 209, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 1276; FHL microfilm 1,375,289.
Registration State: Oklahoma; Registration County: Woodward; Roll: 1852245
http://search.ancestry.com/collections/6482/records/2477498
Year: 1930; Census Place: Mooreland, Woodward, Oklahoma; Roll: 1929; Page: 3B; Enumeration District: 0010; Image: 293.0; FHL microfilm: 2341663
http://search.ancestry.com/collections/6224/records/95497968
Year: 1900; Census Place: Webster, Woodward, Oklahoma; Roll: 1344; Page: 8A; Enumeration District: 0251; FHL microfilm: 1241344
http://search.ancestry.com/collections/7602/records/68359346
"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XC46-7PX : accessed 20 March 2020), James I Wheelock, Mooreland, Woodward, Oklahoma, United States; citing enumeration district (ED) ED 10, sheet 3B, line 77, family 67, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 1929; FHL microfilm 2,341,663.
"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MJMM-MYW : accessed 20 March 2020), James T Wheelock, Mooreland, Woodward, Oklahoma, United States; citing ED 228, sheet 4A, line 15, family 63, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 1489; FHL microfilm 1,821,489.
"Oklahoma, School Records, 1895-1936," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:7BVJ-S36Z : 8 May 2019), J I Wheelock in entry for Irvin Wheelock, 1921-1924; citing School Enrollment, Mooreland, Woodward, Oklahoma, United States, multiple County Clerk offices, Oklahoma school district offices, Oklahoma; FHL microfilm 1,651,180.
"Texas Deaths, 1890-1976," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K377-3LN : 13 March 2018), James Irvin Wheelock in entry for Irvin Orlando Wheelock, 22 Jun 1953; citing certificate number 37947, State Registrar Office, Austin; FHL microfilm 2,113,928.
From FamilySearch.org
http://search.ancestry.com/collections/60525/records/18226562