[Letter from Harris Leon Kempner to Harris Leon Kempner Jr., January 21, 1964], letter, January 21, 1964; (https://texashistory.unt.edu/ark:/67531/metapth1428381/m1/1/: accessed June 24, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .