The Hopkins County Echo (Sulphur Springs, Tex.), Vol. 89, No. 24, Ed. 1 Friday, June 12, 1964, newspaper, June 12, 1964; (https://texashistory.unt.edu/ark:/67531/metapth823266/m1/1/: accessed July 10, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .