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1by Vinson, Robert P.“...U.S. Dept. of the Interior, Bureau of Mines,...”
Published 1981
Government Document Book -
2by Volkwein, J. C. (Jon C.)“...U.S. Dept. of the Interior, Bureau of Mines,...”
Published 1982
Government Document Book -
3by Volkwein, J. C. (Jon C.)“...U.S. Dept. of the Interior, Bureau of Mines,...”
Published 1980
Government Document Book -
4by Thimons, Edward D.“...U.S. Dept. of the Interior, Bureau of Mines,...”
Published 1979
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Government Document Book