San Antonio Register (San Antonio, Tex.), Vol. 51, No. 4, Ed. 1 Thursday, April 30, 1981, newspaper, April 30, 1981; (https://texashistory.unt.edu/ark:/67531/metapth1060272/m1/1/: accessed June 24, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .