The Mangum Star (Mangum, Okla.), Vol. 33, No. 32, Ed. 1 Thursday, January 20, 1921, newspaper, January 20, 1921; (https://gateway.okhistory.org/ark:/67531/metadc283887/m1/3/: accessed April 18, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .