914 resultados para Coal mines and mining.
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Mode of access: Internet.
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"BLS-2877 229."
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Not issued consecutively.
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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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"RMO-563."
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First-third reports, 1915/16-1917/18, issued as California State Mining Bureau Bulletin no. 73, 82, 84.