↑ "Oklahoma, School Records, 1895-1936," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QGRW-X7XB : 19 October 2019), Jack Sunderland, 1926; citing School Enrollment, Byron Township, Alfalfa, Oklahoma, United States, multiple County Clerk offices, Oklahoma school district offices, Oklahoma; FHL microfilm
↑ "Oklahoma, School Records, 1895-1936," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QGTR-MVBB : 19 October 2019), Jack Sunderland, 1929; citing School Enrollment, Byron Township, Alfalfa, Oklahoma, United States, multiple County Clerk offices, Oklahoma school district offices, Oklahoma; FHL microfilm
↑ "United States Census, 1930," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:XCQ5-QCR : accessed 23 October 2022), Jack Sunderland in household of Vernal B Sunderland, Byron, Alfalfa, Oklahoma, United States; citing enumeration district (ED) ED 6, sheet 2A, line 46, family 37, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 1892; FHL microfilm 2,341,626
↑ "Oklahoma, School Records, 1895-1936," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QGLN-XTWR : 19 October 2019), Jack Sunderland, 1930; citing School Enrollment, Byron Township, Alfalfa, Oklahoma, United States, multiple County Clerk offices, Oklahoma school district offices, Oklahoma; FHL microfilm
↑ "Oklahoma, School Records, 1895-1936," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QP3H-GC8B : 18 October 2019), Jack Sunderland, 1936; citing School Enrollment, Byron Township, Alfalfa, Oklahoma, United States, multiple County Clerk offices, Oklahoma school district offices, Oklahoma; FHL microfilm