Latimer, Truett. [Letter from Truett Latimer to William F. Perkins, July 13, 1961], letter, July 13, 1961; (https://texashistory.unt.edu/ark:/67531/metapth1272195/m1/1/: accessed July 15, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .