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Guidebook, Eleventh Annual Field Conference
Midwest Friends of the Pleistocene. Field Conference
其他書名
Mid-Western Friends of the Pleistocene, May 14-15, 1960 ; Eastern South Dakota
出版South Dakota Geological Survey, 1960
URLhttp://books.google.com.hk/books?id=i1UOIc4ZkncC&hl=&source=gbs_api