Rio Grande Herald (Rio Grande City, Tex.), Vol. 34, No. 29, Ed. 1 Thursday, May 6, 1976, newspaper, May 6, 1976; (https://texashistory.unt.edu/ark:/67531/metapth194558/m1/1/: accessed April 28, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .