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United States Mollusca - a Descriptive Manual of Many of the Marine, Land and Fresh Water Shells of North America, North of Mexico
Walter Freeman Webb2010

Foreign land and fresh water shells from all parts of the world except the United States and Canada
Walter Freeman Webb1948
A Catalogue of Recent Mollusca and Other Marine Invertebrates From All Parts of the World
Walter Freeman Webb1939
Handbook for Shell Collectors - Illustrations and Descriptions of Marine Species Foreign to the United States of America
Walter Freeman Webb2010