Whitaker, David. [Letter from David Whitaker to Truett Latimer, March 18, 1961], letter, March 18, 1961; (https://texashistory.unt.edu/ark:/67531/metapth1270530/m1/1/: accessed June 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .