Slater, H. D. El Paso Herald (El Paso, Tex.), Ed. 1, Wednesday, May 19, 1920, newspaper, May 19, 1920; (https://texashistory.unt.edu/ark:/67531/metapth137672/m1/1/: accessed December 14, 2018), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .