Valley, Morton T. [Letter from Morton T. Valley to Cecile Kempner, July 29, 1952], letter, July 29, 1952; (https://texashistory.unt.edu/ark:/67531/metapth1325468/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .