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Fauna and Correlation of the Ravenscrag Formation (Paleocene) of Southwestern Saskatchewan

Loris Shano RussellLoris S. Russell

出版	Royal Ontario Museum, 1974
ISBN	08885416279780888541628
URL	http://books.google.com.hk/books?id=9p4iAQAAIAAJ&hl=&source=gbs_api