The Pony Express (Carthage, Tex.), Ed. 1 Wednesday, March 17, 1976, newspaper, March 17, 1976; (https://texashistory.unt.edu/ark:/67531/metapth508012/m1/1/: accessed May 3, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .