[Message from R. Lee Kempner to I. H. and D. W. Kempner, June 25, 1954], letter, June 25, 1954; (https://texashistory.unt.edu/ark:/67531/metapth1344120/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .