[Letter from D. Jack Davis and Bill McCarter to Dr. Reg Hinely, May 23, 1988], letter, May 23, 1988; (https://texashistory.unt.edu/ark:/67531/metadc1051105/m1/1/: accessed July 13, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .