Diesel Fuel and Gasoline Conservation Act of 1977: Hearing Before the Subcommittee on Energy Conservation and Regulation of the Committee on Energy and Natural Resources, United States Senate, Ninety-fifth Congress, First Session on S. 1699 a Bill to Provide Energy Conservation by Alleviating Current and Continuing Fuel Waste, to Reduce Empty Vehicle Movements, and to Increase Efficiency in Transporting Goods by Motor Carriers which Will Ultimately Benefit Consumers, and for Other Purposes, June 27, 1977