Oklahoma City Times (Oklahoma City, Okla.), Vol. 79, No. 47, Ed. 1 Saturday, April 13, 1968, newspaper, April 13, 1968; (https://gateway.okhistory.org/ark:/67531/metadc993132/m1/1/: accessed June 22, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .