Oklahoma Volksblatt. (Oklahoma City, Okla.), Vol. 13, No. 13, Ed. 1 Friday, June 15, 1906, newspaper, June 15, 1906; (https://gateway.okhistory.org/ark:/67531/metadc943097/m1/1/: accessed April 24, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .