San Antonio Register (San Antonio, Tex.), Vol. 9, No. 1, Ed. 1 Friday, April 7, 1939, newspaper, April 7, 1939; (https://texashistory.unt.edu/ark:/67531/metapth398390/m1/1/: accessed June 20, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .