The Optimist (Abilene, Tex.), Ed. 1, Wednesday, April 1, 1964, newspaper, April 1, 1964; (https://texashistory.unt.edu/ark:/67531/metapth91782/m1/6/: accessed April 26, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .