[Letter from I. H. Kempner to Denny Kempner, January 9, 1956], letter, January 9, 1956; (https://texashistory.unt.edu/ark:/67531/metapth1508606/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .