Kempner, Harris Leon. [Letter from Harris Leon Kempner to Howard W. Baldock, May 31, 1966], letter, May 31, 1966; (https://texashistory.unt.edu/ark:/67531/metapth1427822/m1/1/: accessed July 4, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .