[Letter from D. W. Kempner to Sol S. Steinberg, December 17, 1953], letter, December 17, 1953; (https://texashistory.unt.edu/ark:/67531/metapth1326512/m1/1/: accessed July 5, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .