449 resultados para Coal mines and mining.
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Mode of access: Internet.
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1 folded map in pocket.
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Includes bibliographical references.
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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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First edition, September 1916. cf. verso of t.-p.
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Mode of access: Internet.
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Also verso t.p.: 1894.
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Mode of access: Internet.
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Mode of access: Internet.
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Prepared for Office of Coal Research, U.S. Department of the Interior.
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No. 33 is the final no. of this series.
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Maps on lining papers.
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Caption title.
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Mode of access: Internet.