The Greer County Democrat (Mangum, Okla.), Vol. 26, No. 37, Ed. 1 Thursday, May 25, 1916, newspaper, May 25, 1916; (https://gateway.okhistory.org/ark:/67531/metadc281045/m1/1/: accessed April 23, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .