The Humble Echo (Humble, Tex.), Vol. 29, No. 30, Ed. 1 Thursday, July 25, 1968, newspaper, July 25, 1968; (https://texashistory.unt.edu/ark:/67531/metapth1037196/m1/1/: accessed July 15, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .