The Optimist (Abilene, Tex.), Vol. 55, No. 22, Ed. 1, Friday, March 15, 1968, newspaper, March 15, 1968; (https://texashistory.unt.edu/ark:/67531/metapth99460/m1/1/: accessed August 15, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .