San Antonio Register (San Antonio, Tex.), Vol. 34, No. 6, Ed. 1 Friday, April 10, 1964, newspaper, April 10, 1964; (https://texashistory.unt.edu/ark:/67531/metapth403878/m1/1/: accessed June 20, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .