Rio Grande Herald (Rio Grande City, Tex.), Vol. 33, No. 23, Ed. 1 Thursday, March 20, 1975, newspaper, March 20, 1975; (https://texashistory.unt.edu/ark:/67531/metapth194503/m1/9/: accessed April 25, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .