The Rio Grande Herald (Rio Grande City, Tex.), Vol. 79, No. 29, Ed. 1 Thursday, June 1, 1989, newspaper, June 1, 1989; (https://texashistory.unt.edu/ark:/67531/metapth195187/m1/1/: accessed April 27, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .