The Oklahoma Labor Unit (Oklahoma City, Okla.), Vol. 2, No. 5, Ed. 1 Saturday, July 23, 1910, newspaper, July 23, 1910; (https://gateway.okhistory.org/ark:/67531/metadc106901/m1/3/: accessed April 23, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .