Zavala County Sentinel (Crystal City, Tex.), Vol. 26, No. 51, Ed. 1 Friday, May 6, 1938, newspaper, May 6, 1938; (https://texashistory.unt.edu/ark:/67531/metapth1096288/m1/2/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .