Waldrop, A. Sam. [Letter from A. Sam Waldrop to Truett Latimer, May 15, 1961], letter, May 15, 1961; (https://texashistory.unt.edu/ark:/67531/metapth1273997/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .