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Eocene Deposits of the Middle Atlantic Slope in Delaware, Maryland, and Virginia, by William Bullock Clark. [U.S. Geological Survey Bulletin No. 141.].
United States. Congress. House
出版
Verlag nicht ermittelbar
, 1897
URL
http://books.google.com.hk/books?id=-ytIuwEACAAJ&hl=&source=gbs_api