Silva, Marcelo. Rio Grande Herald (Rio Grande City, Tex.), Vol. 35, No. 27, Ed. 1 Thursday, March 20, 1980, newspaper, March 20, 1980; (https://texashistory.unt.edu/ark:/67531/metapth194759/m1/1/: accessed September 25, 2018), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .