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By "Tryon, George W. "
A monograph of the fresh-water univalve mollusca of the United States / by George W. Tryon.
By: Tryon, George W. - Haldeman, Samuel Stehman,
Publication info: Philadelphia :Conchological Section of the Academy of Natural Sciences,1870?
Contributed by: Smithsonian Libraries
BHL Collections: Smithsonian Libraries