The Pony Express (Carthage, Tex.), Vol. 13, No. 14, Ed. 1 Tuesday, April 18, 1961, newspaper, April 18, 1961; (https://texashistory.unt.edu/ark:/67531/metapth507878/m1/1/: accessed July 7, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .