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Pegmatite Investigations in Colorado, Wyoming and Utah 1942-1944
John Bernard Hanley
出版U.S. Government Printing Office, 1950
URLhttp://books.google.com.hk/books?id=YfXNAAAAMAAJ&hl=&source=gbs_api
EBookFULL_PUBLIC_DOMAIN
註釋A report on resources of beryllium, tantalum and lithium minerals, and of muscovite.