Marble, W. C. Mangum Sun-Monitor. (Mangum, Okla.), Vol. 20, Ed. 1 Monday, August 22, 1910, newspaper, August 22, 1910; (https://gateway.okhistory.org/ark:/67531/metadc285736/m1/1/: accessed October 21, 2017), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .