Long, Albert L. [Letter from Albert L. Long to Harris L. Kempner, May 12, 1964], letter, May 12, 1964; (https://texashistory.unt.edu/ark:/67531/metapth1421038/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .