[Letter from I. H. Kempner, Jr., to D. W. Kempner, April 14, 1949], letter, February 14, 1949; (https://texashistory.unt.edu/ark:/67531/metapth1013593/m1/1/: accessed July 7, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .