Farmers' Champion (Elgin, Okla.), Vol. 5, No. 47, Ed. 1, Wednesday, September 1, 1915, newspaper, September 1, 1915; (https://gateway.okhistory.org/ark:/67531/metadc69624/m1/1/: accessed April 19, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .