Cimarron Valley Clipper (Coyle, Okla.), Vol. 11, No. 15, Ed. 1 Thursday, August 31, 1911, newspaper, August 31, 1911; (https://gateway.okhistory.org/ark:/67531/metadc910653/m1/1/: accessed April 19, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .