410 resultados para Lead mines and mining
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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.
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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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Not issued consecutively.
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"Period of performance: September, l968- December, 1973."
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"IMSRP-IV."
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Under contract between the University of Utah and the U.S. Atomic Energy Commission, the writer has carried on a field and laboratory investigation of the uranium deposits in the Salt Wash sandstone of the Colorado Plateau.
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"April 1953, [site issuance date]."
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Fiscal year coverage, 1971-1975; calendar year coverage, 1976-1980.
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Mode of access: Internet.
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Mode of access: Internet.
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Mode of access: Internet.