Mangum Sun-Monitor. (Mangum, Okla.), Vol. 13, No. 20, Ed. 1 Thursday, May 14, 1903, newspaper, May 14, 1903; (https://gateway.okhistory.org/ark:/67531/metadc285222/m1/1/: accessed April 25, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .