[Letter from I. H. Kempner to Texas Gulf Producing Company, May 1, 1954], letter, May 1, 1954; (https://texashistory.unt.edu/ark:/67531/metapth1502834/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .