Oklahoma Labor Unit (Oklahoma City, Okla.), Vol. 5, No. 33, Ed. 1 Saturday, February 1, 1913, newspaper, February 1, 1913; (https://gateway.okhistory.org/ark:/67531/metadc157134/m1/1/: accessed August 15, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .