The Pony Express (Carthage, Tex.), Vol. 21, No. 4, Ed. 1 Wednesday, December 17, 1969, newspaper, December 17, 1969; (https://texashistory.unt.edu/ark:/67531/metapth507971/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .