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  • Coal-washing investigations [microform] : methods and tests

    • Text
    • [Washington?] : U.S. G.P.O., 1929.
    • 1929

  • Friability, slacking characteristics, low-temperature carbonization assay, and agglutinating value of Washington and other coals [microform]

    • Text
    • [Washington?] : U.S. G.P.O., 1932.
    • 1932

  • Pneumatic tabling of coal [microform] : effect of specific gravity, size, and shape

    • Text
    • [Washington?] : U.S. G.P.O., 1932.
    • 1932

  • Study of Marshall-Bird test for determining agglutinating value of coal [microform]

    • Text
    • Washington, D.C. : [s.n.], 1930.
    • 1930

  • Effect of certain operating variables on efficiency of coal-washing table [microform]

    • Text
    • Washington, D.C. : [s.n.], 1931.
    • 1931

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