165 resultados para Abandoned coal mines
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1 folded map in pocket.
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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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Mode of access: Internet.
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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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"Period of performance: September, l968- December, 1973."
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"IMSRP-IV."
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Fiscal year coverage, 1971-1975; calendar year coverage, 1976-1980.
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Maps on lining papers.
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Caption title.
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"February 1983."
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Mode of access: Internet.
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Mode of access: Internet.
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Mode of access: Internet.