Lake Keystone News (Mannford, Okla.), Vol. 11, No. 36, Ed. 1 Thursday, September 3, 1970, newspaper, September 3, 1970; (https://gateway.okhistory.org/ark:/67531/metadc1945379/m1/1/: accessed June 19, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .