Mt. Vernon Optic-Herald (Mount Vernon, Tex.), Vol. 93, No. 23, Ed. 1 Thursday, February 29, 1968, newspaper, February 29, 1968; (https://texashistory.unt.edu/ark:/67531/metapth1277959/m1/6/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .