Lake Keystone News (Mannford, Okla.), Vol. 12, No. 39, Ed. 1 Thursday, September 23, 1971, newspaper, September 23, 1971; (https://gateway.okhistory.org/ark:/67531/metadc1945438/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .