Mt. Vernon Optic-Herald (Mount Vernon, Tex.), Vol. 98, No. 42, Ed. 1 Thursday, July 5, 1973, newspaper, July 5, 1973; (https://texashistory.unt.edu/ark:/67531/metapth1277993/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .