Duffey, P. P. Oklahoma Agriculturist (El Reno, Okla.), Vol. 1, No. 1, Ed. 1 Thursday, March 15, 1906, newspaper, March 15, 1906; (https://gateway.okhistory.org/ark:/67531/metadc912327/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .