Oklahoma Vorwärts. (Cordell, Okla.), Vol. 16, No. 5, Ed. 1 Friday, June 25, 1915, newspaper, June 25, 1915; (https://gateway.okhistory.org/ark:/67531/metadc943360/m1/1/: accessed April 19, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .