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  1. Entwicklungsgeschichte von Littorina obtusata / von H.C. Delsman.
    By: Delsman, Hendricus Christoffel,
    Publication info: Leiden :Brill,1914?
    Contributed by: Smithsonian Libraries
    Subjects: Gastropoda  Littorinidae  
    BHL Collections: Smithsonian Libraries
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