[Letter from I. H. Kempner to W. H. Louviere, February 23, 1960], letter, February 23, 1960; (https://texashistory.unt.edu/ark:/67531/metapth1182851/m1/2/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .