Citation Codes Equivalent Citations citation codes Docket Number Nos. 72-779, 72-768, 72-781, 72-785. See more information ... Smart Summary Please sign up to generate summary. OPINION SOUTHWEST GAS CORP. v. UNITED STATES ET AL. ARIZONA EX REL. STATE CORPORATION COMMISSION ET AL. Affirmed on appeals from D. C. Colo. MR. JUSTICE BRENNAN, MR. JUSTICE WHITE, and MR. JUSTICE MARSHALL took no part in the consideration or decision of these cases. Reported below: 358 F. Supp. 820.