The Humble Echo (Humble, Tex.), Vol. 28, No. 10, Ed. 1 Thursday, March 9, 1967, newspaper, March 9, 1967; (https://texashistory.unt.edu/ark:/67531/metapth1037460/m1/1/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .