Stockpile and Accessibility of Strategic and Critical Materials to the U.S. in Time of War. Part 6., Petroleum, Gas, and Coal: Industrial and Labor Representatives; Administrative and Production Experts on Petroleum, Gas, Coal, and Synthetic Fuels hearings before the United States Senate Committee on Interior and Insular Affairs, Special Subcommittee on Minerals, Materials, and Fuels Economics, Eighty-Third Congress, first session and Eighty-Third Congress, second session, on Nov. 30, Dec. 1-4, 10, 16, 18, 1953, Jan. 6, Feb. 19, 1954