[Letter from I. H. Kempner to I. H. Kempner, Jr., October 13, 1949], letter, October 13, 1949; (https://texashistory.unt.edu/ark:/67531/metapth1053893/m1/1/: accessed August 15, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .