Guth, Lee. [Letter from Lee Guth to D. W. Kempner, March 1, 1954], letter, March 1, 1954; (https://texashistory.unt.edu/ark:/67531/metapth1383541/m1/1/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .