419 resultados para Gold mines and mining.


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Mode of access: Internet.

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Mode of access: Internet.

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Short bibliography at end of each chapter.

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Includes bibliographical references.

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"Appointed to inquire into the causes of the present dearness and scarcity of coal."

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"Specially compiled and prepared for the convenient use of mine officials, mining engineers, and students preparing themselves for certificates of competency as mine inspectors or mine foremen."

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"Report of the United States Bureau of Mines to the Pennsylvania State Anthracite Mine Cave Commission and review of the compressive strength of anthracite, bituminous coals and mine supports."

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Includes bibliographical references.

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Also verso t.p.: 1894.