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A Comparison of Rock and Soil Samples for Geochemical Mapping of Two Porphyry-metal Systems in Colorado

出版	U.S. Department of the Interior, Geological Survey, 1978
URL	http://books.google.com.hk/books?id=TLGIan6TsjoC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN