The Oklahoma Labor Unit (Oklahoma City, Okla.), Vol. 2, No. 2, Ed. 1 Saturday, July 3, 1909, newspaper, July 3, 1909; (https://gateway.okhistory.org/ark:/67531/metadc106836/m1/9/: accessed April 25, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .