Mt. Vernon Optic-Herald (Mount Vernon, Tex.), Vol. 102, No. 35, Ed. 1 Thursday, May 12, 1977, newspaper, May 12, 1977; (https://texashistory.unt.edu/ark:/67531/metapth1295576/m1/1/: accessed June 25, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .