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    The international systems of hard-coal classification and their application to American coals by Ode, W. H. (William Harlan), 1905-

    Published: U.S. Dept. of the Interior, Bureau of Mines : For sale by the Supt. of Docs., U.S. G.P.O., 1958
    Description: iii, 19 pages : illustrations ; 26 cm.
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    The international systems of hard-coal classification and their application to American coals
  2. 2

    Coal data

    Published: U.S. Department of the Interior, Bureau of Land Management, Portland Service Center, 1970
    Description: 1 online resource (2 pages) : illustrations.
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    Coal data

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