"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M29J-JS9 : accessed 21 February 2018), Delia Betts in household of John H Betts, Justice Precinct 4, Cass, Texas, United States; citing enumeration district (ED) ED 33, sheet 15A, family 240, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 1537; FHL microfilm 1,375,550.
"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MHYB-N6B : accessed 21 February 2018), Delia Betts in household of J H Betts, Jolly, Clay, Texas, United States; citing ED 21, sheet 1B, line 85, family 21, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 1784; FHL microfilm 1,821,784.