Final report of the world coal study : "Coal-bridge to the future" hearing before the Subcommittee on Energy and Power of the Committee on Interstate and Foreign Commerce, House of Representatives, Ninety-sixth Congress, second session, May 20, 1980
United States.Congress.House.Committee on Interstate and Foreign Commerce.Subcommittee on Energy and Power.
Washington U.S.G.P.O.
1980
Coal.