The Labor Signal. (Oklahoma City, Okla. Terr.), Vol. 3, No. 22, Ed. 1 Friday, March 13, 1903, newspaper, March 13, 1903; (https://gateway.okhistory.org/ark:/67531/metadc119100/m1/1/: accessed October 23, 2020), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .