Slater, H. D. El Paso Herald (El Paso, Tex.), Ed. 1, Tuesday, January 4, 1921, newspaper, January 4, 1921; (https://texashistory.unt.edu/ark:/67531/metapth143843/m1/4/: accessed September 28, 2020), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .