The Hammon Advocate (Hammon, Okla.), Vol. 8, No. 1, Ed. 1 Thursday, May 9, 1918, newspaper, May 9, 1918; (https://gateway.okhistory.org/ark:/67531/metadc1777487/m1/1/: accessed April 23, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .