San Antonio Register (San Antonio, Tex.), Vol. 33, No. 51, Ed. 1 Friday, February 21, 1964, newspaper, February 21, 1964; (https://texashistory.unt.edu/ark:/67531/metapth403829/m1/2/: accessed September 23, 2018), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .