Rio Grande Herald (Rio Grande City, Tex.), Vol. 35, No. 34, Ed. 1 Thursday, June 9, 1977, newspaper, June 9, 1977; (https://texashistory.unt.edu/ark:/67531/metapth194615/m1/3/: accessed December 12, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .