Kempner, Isaac H. (Isaac Herbert), 1873-1967. [Letter from Isaac H. Kempner to Curtis Hall, June 21, 1962], letter, June 21, 1962; (https://texashistory.unt.edu/ark:/67531/metapth1508320/m1/1/: accessed August 15, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .