Ellis County Socialist (Shattuck, Okla.), Vol. 3, No. 7, Ed. 1 Thursday, June 8, 1916, newspaper, June 8, 1916; (https://gateway.okhistory.org/ark:/67531/metadc1918572/m1/1/: accessed June 24, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .