Oral History Interview with M. T. Hebel, text, 1995~; (https://texashistory.unt.edu/ark:/67531/metapth845105/m1/1/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Oral History Interview with M. T. Hebel, text, 1995~; (https://texashistory.unt.edu/ark:/67531/metapth845105/m1/1/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .