Mt. Vernon Optic-Herald (Mount Vernon, Tex.), Vol. 100, No. 40, Ed. 1 Thursday, June 19, 1975, newspaper, June 19, 1975; (https://texashistory.unt.edu/ark:/67531/metapth1267964/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .