[Letter from I. H. Kempner to Lamar Fleming, Jr., February 28, 1958], letter, February 28, 1958; (https://texashistory.unt.edu/ark:/67531/metapth1514349/m1/1/: accessed June 4, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .