McCalla, Kenneth. [Letter from Kenneth McCalla to Truett Latimer, October 15, 1954], letter, October 15, 1954; (https://texashistory.unt.edu/ark:/67531/metapth1185837/m1/1/: accessed July 8, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .