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U.S. Geological Survey Bulletin

Gregory F. UlmishekMidcontinent Strategic and Critical Minerals Project (U.S.). WorkshopH. Douglas Klemme

出版	U.S. Government Printing Office, 1983
URL	http://books.google.com.hk/books?id=kcxRAQAAMAAJ&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN