The Mangum Star (Mangum, Okla.), Vol. 33, No. 5, Ed. 1 Wednesday, July 14, 1920, newspaper, July 14, 1920; (https://gateway.okhistory.org/ark:/67531/metadc284280/m1/1/: accessed April 23, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .