Mt. Vernon Optic-Herald (Mount Vernon, Tex.), Vol. 105, No. 48, Ed. 1 Thursday, July 31, 1980, newspaper, July 31, 1980; (https://texashistory.unt.edu/ark:/67531/metapth1336091/m1/1/: accessed July 5, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .