Thomas, Jerry. [Letter from Jerry Thomas to Harris L. Kempner, March 4, 1960], letter, March 4, 1960; (https://texashistory.unt.edu/ark:/67531/metapth1425138/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .