[Letter from Daniel W. Kempner to Henry B. Stenzel, July 21, 1952], letter, July 21, 1952; (https://texashistory.unt.edu/ark:/67531/metapth1343383/m1/1/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .