Oklahoma Labor Unit (Oklahoma City, Okla.), Vol. 1, No. 33, Ed. 1 Saturday, January 30, 1909, newspaper, January 30, 1909; (https://gateway.okhistory.org/ark:/67531/metadc107605/m1/1/: accessed April 24, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .