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Geochemistry of Minor Elements in Coals of the Northern Great Plains Coal Province
Peter ZubovicTaisia StadnichenkoNola B. Sheffey
出版U.S. Government Printing Office, 1961
URLhttp://books.google.com.hk/books?id=DrUPAAAAIAAJ&hl=&source=gbs_api
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註釋A study of 15 minor elements in some of the coals of Montana, North Dakota, and Wyoming.