The Mangum Mirror (Mangum, Okla.), Vol. 1, No. 37, Ed. 1 Tuesday, July 24, 1917, newspaper, July 24, 1917; (https://gateway.okhistory.org/ark:/67531/metadc281864/m1/1/: accessed April 23, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .