Pope, Joe L. Amarillo Daily News (Amarillo, Tex.), Vol. 12, No. 102, Ed. 1 Thursday, May 5, 1921, newspaper, May 5, 1921; (https://texashistory.unt.edu/ark:/67531/metapth318843/m1/1/: accessed December 12, 2018), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .