Coal Use by the Nation's Railroads: Hearings Before the Subcommittee on Energy and Mineral Resources of the Committee on Energy and Natural Resources, United States Senate, Ninety-eighth Congress, First and Second Session, on the Reintroduction of Coal as Fuel for Railroad Locomotives, Roanoke, VA, November 28, 1983; Washington, D.C., December 20, 1983; Richmond, VA, January 19, 1984