"Sleeping giant."; "Ratcliff, J. D."; "Coal mines and mining.", "Fuel.", "Coal trade--United States."; "Ratcliff, J. D."; "1946"; "Journal article reprint from: Collier's, 1946:Feb. Authored by a former coal miner, who discusses the coal industry's beginnings, research findings in fuel alternatives, and expansion into various national and world markets."; ""; "P359"; "pec"; "Fuel.", "Coal mines and mining.", "Coal trade--United States."; "14256"; .