Echols, R. C. The Mangum Star. (Mangum, Okla. Terr.), Vol. 13, No. 50, Ed. 1 Thursday, June 20, 1901, newspaper, June 20, 1901; (https://gateway.okhistory.org/ark:/67531/metadc282050/m1/1/: accessed November 17, 2017), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .