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Maryland Geological Survey. [Stratigraphical Reports.] Eocene. (The Eocene Deposits of Maryland. By William Bullock Clark and George Curtis Martin.-Systematic Paleontology, Eocene. [By Various Authors.]).

MARYLAND, State of. Geological Survey

出版	Johns Hopkins Press, 1901
URL	http://books.google.com.hk/books?id=aI0DMwEACAAJ&hl=&source=gbs_api