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  1. 1
    PREVAL : prefeasibility software program for evaluating mineral properties : version 1.01, users manual, using Lotus 1-2-3 release 2.01 or newer

    PREVAL : prefeasibility software program for evaluating mineral properties : version 1.01, users manual, using Lotus 1-2-3 release 2.01 or newer by Smith, R. Craig

    [Washington, D.C.] : U.S. Dept. of the Interior, Bureau of Mines, 1992
    Format: Government Document Book


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  2. 2
    Domestic secondary lead industry : production and regulatory compliance costs

    Domestic secondary lead industry : production and regulatory compliance costs by Smith, R. Craig

    [Washington, D.C.?] : U.S. Dept. of the Interior, Bureau of Mines, 1987
    Format: Government Document Book


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