NORTHERN NATURAL GAS COMPANY and Permian Basin Pipeline Company, Petitioners, v. FEDERAL POWER COMMISSION. No. 13317.United States Court of Appeals, Third Circuit.Argued February 20, 1961. Decided March 27, 1961. F. Vinson Roach, Omaha, Neb. (Lawrence I. Shaw, Jack C. Osborne, Omaha, Neb., Richard J. Connor, Walter E. Gallagher, Washington, D.C., on the brief), for petitioners. […]