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Fachgebiet: Nord- und Mittelamerika
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Mineral resources of wilderness study areas: west-central Arizona and part of San Bernardino County, California
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Mining engineers' handbook / written by a staff of forty-six specialists under the editorship of Robert Peele ...
2
United States Geological Survey: Professional paper / US Department of the Interior, US Geological Survey
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Geological Survey of Canada: Paper / Geological Survey of Canada, Department of Mines and Technical Surveys
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