The Mangum Star. (Mangum, Okla.), Vol. 21, No. 42, Ed. 1 Thursday, April 15, 1909, newspaper, April 15, 1909; (https://gateway.okhistory.org/ark:/67531/metadc281121/m1/1/: accessed April 23, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .