Zavala County Sentinel (Crystal City, Tex.), Vol. [26], No. [46], Ed. 1 Friday, April 1, 1938, newspaper, April 1, 1938; (https://texashistory.unt.edu/ark:/67531/metapth1096629/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .