[Letter from Harris L. Kempner to Mr. Marion J. Levy, Jr., August 1, 1956], letter, August 1, 1956; (https://texashistory.unt.edu/ark:/67531/metapth1419002/m1/1/: accessed July 10, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .