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The Petrology and Economic Geology of the Upper Devonian Birdbear Formation in Southeastern Saskatchewan

Saskatchewan. Department of Mineral ResourcesR. A. H. Nichols

出版	Department of Mineral Resources, Prov. of Saskatchewan, 1970
URL	http://books.google.com.hk/books?id=LyvcSgAACAAJ&hl=&source=gbs_api