San Antonio Register (San Antonio, Tex.), Vol. 43, No. 3, Ed. 1 Friday, July 6, 1973, newspaper, July 6, 1973; (https://texashistory.unt.edu/ark:/67531/metapth1052256/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .