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Search U.S. government technical reports digitized or harvested by TRAIL.
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10 results returnedCoal-research activities of the Bureau of Mines
Annual report of research and technologic work on coal :fiscal year 1950
Annual report of research and technologic work on coal :fiscal year 1951
Annual report of research and technologic work on coal and related investigations :fiscal year 1952
Bureau of mines research and technologic work on coal, 1960
Bureau of mines research and technologic work on coal, 1959
Bureau of mines research and technologic work on coal, 1962
Bureau of mines research and technologic work on coal, 1961
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