[Letter from D. W. Kempner to I. H. Kempner, Jr., June 20, 1950], letter, June 20, 1950; (https://texashistory.unt.edu/ark:/67531/metapth1013657/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .