The Morning Tulsa Daily World (Tulsa, Okla.), Vol. 15, No. 257, Ed. 1, Wednesday, June 15, 1921, newspaper, June 15, 1921; (https://gateway.okhistory.org/ark:/67531/metadc77796/m1/7/: accessed June 4, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .