Western Oil Derrick (Oklahoma City, Okla.), Vol. 3, No. 18, Ed. 2 Saturday, May 1, 1920, newspaper, May 1, 1920; (https://gateway.okhistory.org/ark:/67531/metadc152238/m1/1/: accessed May 6, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .