[Letter from Jean-Charles Sasportas to I. H. Kempner, July 28, 1951], letter, July 28, 1951; (https://texashistory.unt.edu/ark:/67531/metapth1485935/m1/1/: accessed June 27, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .