Mangum Sun-Monitor. (Mangum, Okla.), Vol. 22, No. 40, Ed. 1 Thursday, June 6, 1912, newspaper, June 6, 1912; (https://gateway.okhistory.org/ark:/67531/metadc286260/m1/1/: accessed April 24, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .