[Letter from I. H. Kempner to Don H. Hinga, February 11, 1953], letter, February 11, 1953; (https://texashistory.unt.edu/ark:/67531/metapth1467060/m1/1/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .