Tizzard, Bob. Oral History Interview with Bob Tizzard, September 3, 2004, text, September 3, 2004; (https://texashistory.unt.edu/ark:/67531/metapth1604602/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .