The Plainsman Press (Levelland, Tex.), Vol. 10, No. 6, Ed. 1 Wednesday, December 13, 1967, newspaper, December 13, 1967; (https://texashistory.unt.edu/ark:/67531/metapth1476328/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .