Oklahoma Volksblatt. (Oklahoma City, Okla.), Vol. 14, No. 15, Ed. 1 Friday, June 28, 1907, newspaper, June 28, 1907; (https://gateway.okhistory.org/ark:/67531/metadc943768/m1/2/: accessed May 7, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .