[Letter from H. Gale Rogers to Isaac H. Kempner, September 12, 1951], letter, September 12, 1951; (https://texashistory.unt.edu/ark:/67531/metapth1486009/m1/2/: accessed July 8, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .