Abernethy, Tom G. [Letter from Tom G. Abernethy to Perry E. Moore, January 16, 1967], letter, January 16, 1967; (https://texashistory.unt.edu/ark:/67531/metapth1266956/m1/1/: accessed June 20, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .