The Mangum Star (Mangum, Okla.), Vol. 32, No. 45, Ed. 1 Wednesday, April 21, 1920, newspaper, April 21, 1920; (https://gateway.okhistory.org/ark:/67531/metadc284269/m1/1/: accessed June 8, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .