Jessee, Elmer V. The Mangum Star (Mangum, Okla.), Vol. 32, No. 49, Ed. 1 Saturday, May 22, 1920, newspaper, May 22, 1920; (https://gateway.okhistory.org/ark:/67531/metadc284075/m1/1/: accessed December 15, 2017), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .