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81“...U.S. Dept. of the Interior, Bureau of Mines,...”
Government Document Book -
82Published 1976“...U.S. Dept. of the Interior, Bureau of Mines,...”
Government Document Book -
83by Blasko, Donald P.“...U.S. Dept. of the Interior, Bureau of Mines,...”
Published 1976
Government Document Book -
84Published 1976“...U.S. Dept. of the Interior, Bureau of Mines,...”
Government Document Book -
85“...U.S. Dept. of the Interior, Bureau of Mines,...”
Government Document Book -
86“...U.S. Dept. of the Interior, Bureau of Mines,...”
Government Document Book -
87by Tisot, Peter R.“...U.S. Dept. of the Interior, Bureau of Mines,...”
Published 1975
Government Document Book -
88Published 1975“...U.S. Dept. of the Interior, Bureau of Mines,...”
Government Document Book -
89by Kuehn, D. G.“...U.S. Dept. of the Interior, Bureau of Mines,...”
Published 1975
Government Document Book -
90“...U.S. Dept. of the Interior, Bureau of Mines,...”
Government Document Book -
91“...U.S. Dept. of the Interior, Bureau of Mines,...”
Government Document Book -
92by Cavallaro, J. A.“...U.S. Dept. of the Interior, Bureau of Mines,...”
Published 1976
Government Document Book -
93“...U.S. Dept. of the Interior, Bureau of Mines,...”
Government Document Book -
94“...U.S. Dept. of the Interior, Bureau of Mines,...”
Government Document Book -
95by Wilson, Donald A.“...U.S. Dept. of the Interior, Bureau of Mines,...”
Published 1976
Government Document Book -
96by Tweeton, Daryl R.“...U.S. Dept. of the Interior, Bureau of Mines,...”
Published 1976
Government Document Book -
97Published 1976“...U.S. Dept. of the Interior, Bureau of Mines,...”
Government Document Book -
98“...U.S. Dept. of the Interior, Bureau of Mines,...”
Government Document Book -
99by Hertzberg, Martin“...U.S. Dept. of the Interior, Bureau of Mines,...”
Published 1976
Government Document Book -
100“...U.S. Dept. of the Interior, Bureau of Mines,...”
Government Document Book