Mangum Sun-Monitor. (Mangum, Okla.), Vol. 17, No. 26, Ed. 1 Thursday, June 13, 1907, newspaper, June 13, 1907; (https://gateway.okhistory.org/ark:/67531/metadc284730/m1/1/: accessed April 25, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .