[Letter from I. H. Kempner to David F. Weston, December 15, 1959], letter, December 15, 1959; (https://texashistory.unt.edu/ark:/67531/metapth1461671/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .