Drumright Evening Derrick (Drumright, Okla.), Vol. 4, No. 128, Ed. 1 Monday, June 17, 1918, newspaper, June 17, 1918; (https://gateway.okhistory.org/ark:/67531/metadc148496/m1/5/: accessed January 16, 2019), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .