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s j kropschot
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Wilderness mineral potential
Sherman P. Marsh, S. J. Kropschot · U.S. G.P.O.
1183 sayfa · 1984
Mines and mineral resources / Wilderness areas / Forest reserves / Wilderness / Mineral resources
USGS mineral resources program-- supporting stewardship of America's natural resources
S. J. Kropschot · U.S. Dept. of the Interior, U.S. Geological Survey
35 sayfa · 2006
Mineral Resource Surveys Program (U.S.) / Mines and mineral resources
Geochemical studies of rare earth elements in the Portuguese Pyrite Belt, and geologic and geochemical controls on gold distribution
D. J. Grimes, S. J. Kropschot · For sale by U.S. Geological Survey, Information Services
40 sayfa · 1998
Geochemistry / Gold ores / Rare earth metals