194 resultados para Abandoned mines


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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 and index.

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Mode of access: Internet.

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Transportation Department, Office of Environmental Affairs, Washington, D.C.

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Transportation Department, Office of Environmental Affairs, Washington, D.C.

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Transportation Department, Office of Environmental Affairs, Washington, D.C.

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Transportation Department, Office of Environmental Affairs, Washington, D.C.

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Transportation Department, Office of Environmental Affairs, Washington, D.C.

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Mode of access: Internet.

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Not issued consecutively.

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Part of the illustrative matter is colored, part folded.

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Mode of access: Internet.