Casler, Howard M. The Oklahoma Labor Unit (Oklahoma City, Okla.), Vol. 3, No. 32, Ed. 1 Saturday, January 13, 1912, newspaper, January 13, 1912; (https://gateway.okhistory.org/ark:/67531/metadc107054/m1/1/: accessed August 19, 2018), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .