Rio Grande Herald (Rio Grande City, Tex.), Vol. 35, No. 84, Ed. 1 Thursday, April 23, 1981, newspaper, April 23, 1981; (https://texashistory.unt.edu/ark:/67531/metapth194816/m1/1/: accessed May 3, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .