Rio Grande Herald (Rio Grande City, Tex.), Vol. 35, No. 85, Ed. 1 Thursday, April 30, 1981, newspaper, April 30, 1981; (https://texashistory.unt.edu/ark:/67531/metapth194817/m1/1/: accessed July 9, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .