The Hereford Brand (Hereford, Tex.), Vol. 66, No. 16, Ed. 1 Thursday, April 20, 1967, newspaper, April 20, 1967; (https://texashistory.unt.edu/ark:/67531/metapth1321632/m1/2/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .