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  1. 1

    Radioactive elements in coal and fly ash : abundance, forms, and environmental significance by Geological Survey (U.S.)

    Published: U.S. Dept. of the Interior, U.S. Geological Survey, 1997
    Description: 1 online resource.
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    Government Document eBook
  2. 2

    Spatial trends in ash yield, sulfur, selenium, and other selected trace element concentrations in coal beds of the Appalachian Plateau Region, U.S.A. Version 1.0. by Neuzil, Sandra G.

    Published: U.S. Geological Survey, 2005
    Description: 1 electronic text (18 pages, 84 unnumbered pages) : HTML, digital, PDF file.
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    Government Document Electronic eBook
  3. 3

    Trace elements in coal ash by Deonarine, Amrika, Kolker, Allan, Doughten, Michael

    Published: U.S. Department of the Interior, U.S. Geological Survey, 2015
    Description: 1 online resource (4 unnumbered pages) : color illustrations.
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    Government Document eBook