Oklahoma City Times (Oklahoma City, Okla.), Vol. 56, No. 77, Ed. 1 Wednesday, May 21, 1975, newspaper, May 21, 1975; (https://gateway.okhistory.org/ark:/67531/metadc1796704/m1/1/: accessed June 19, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .