Věstník (West, Tex.), Vol. 45, No. 31, Ed. 1 Wednesday, July 31, 1957, newspaper, July 31, 1957; (https://texashistory.unt.edu/ark:/67531/metapth625090/m1/1/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .