The Hopkins County Echo (Sulphur Springs, Tex.), Vol. 93, No. 23, Ed. 1 Friday, June 7, 1968, newspaper, June 7, 1968; (https://texashistory.unt.edu/ark:/67531/metapth1585652/m1/4/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .