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Rare and Uncommon Chemical Elements in Coal, by F.H. Gibson and W.A. Selvig

F. H. GibsonW. A. SelvigEtats-Unis. Mines (Bureau)

出版	U.S. Government Printing Office, 1944
URL	http://books.google.com.hk/books?id=fbvrtgAACAAJ&hl=&source=gbs_api