No. 72-1737. Argued and Submitted May 22, 1973. Decided October 26, 1973. Rehearing Denied January 23, 1974. Elliott Moore, Acting Asst. Gen. Counsel, Russell H. Gardner, William F. Wachter, Marjorie S. Godfreed, Peter G. Nash, John S. Irving, and Patrick Hardin, Washington, D.C., for petitioner. C. A. Kothe and Richard L. Barnes, Koths Eagleton, Inc., Tulsa, Okl., for respondent. John M. Keefer, Jarboe Keefer, Tulsa, Okl., for intervenor. Before SETH and DOYLE, Circuit Judges, and LARAMORE, Senior