Regulatory reform. Vol. 6, Public witnesses, federal rate regulation of electric utilities, wholesale power, gas producers' delivery obligations : hearings before the Subcommittee on Oversight and Investigations of the Committee on Interstate and Foreign Commerce, House of Representatives and the Committees on Commerce and Government Operations, United States Senate, Ninety-fourth Congress, second session : public witnesses, June 6 and 7, 1976 : federal rate regulation of electric utilities, June 12, 1976 : wholesale power: the federal regulatory process, July 16, 1976 : gas producers' delivery obligations: Gulf warranty case, July 31, 1976