Oklahoma Labor Unit (Oklahoma City, Okla.), Vol. 5, No. 45, Ed. 1 Saturday, April 26, 1913, newspaper, April 26, 1913; (https://gateway.okhistory.org/ark:/67531/metadc157145/m1/3/: accessed April 24, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .