Pope, Joe L. Amarillo Daily News (Amarillo, Tex.), Vol. 12, No. 121, Ed. 1 Friday, May 27, 1921, newspaper, May 27, 1921; (https://texashistory.unt.edu/ark:/67531/metapth318862/m1/1/: accessed December 11, 2018), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .