Elk City News-Democrat (Elk City, Okla.), Vol. 18, No. 49, Ed. 1 Thursday, April 7, 1921, newspaper, April 7, 1921; (https://gateway.okhistory.org/ark:/67531/metadc497027/m1/3/: accessed January 24, 2020), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .