The Oklahoma Socialist. (Duncan, Okla.), Vol. 1, No. 12, Ed. 1 Thursday, March 31, 1910, newspaper, March 31, 1910; (https://gateway.okhistory.org/ark:/67531/metadc1917216/m1/1/: accessed July 7, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .