Kempner, Harris Leon. [Letter from Harris Leon Kempner to Boys Town of Missouri, June 29, 1959], letter, June 29, 1959; (https://texashistory.unt.edu/ark:/67531/metapth1435954/m1/1/: accessed May 26, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .