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North American Paleozoic land snails
其他書名
With a summary of other Paleozoic nonmarine snails. By Alan Solem and Ellis L(eon) Yochelson
出版U.S. Government Printing Office, 1979
URLhttp://books.google.com.hk/books?id=ilEazgEACAAJ&hl=&source=gbs_api