[Letter from Harris L. Kempner Jr. to W. J. Jinkins Jr., June 28, 1965], letter, June 28, 1965; (https://texashistory.unt.edu/ark:/67531/metapth1428392/m1/1/: accessed June 29, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .