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  1. Catalogue of Phaneropneumona, or terrestrial operculated Mollusca, in the collection of the British Museum / [prepared by L. Pfeiffer].
    By: British Museum (Natural History). - Pfeiffer, Louis,
    Publication info: London :Printed by order of the Trustees,1852
    Contributed by: Smithsonian Libraries
    Subjects: British Museum (Natural History)  Catalogs and collections  Cyclophoridae  Helicinidae  Mollusks  
    BHL Collections: Smithsonian Libraries
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  2. The cyclophorid operculate land mollusks of America,
    By: Torre y Huerta, Carlos de la, - Bartsch, Paul, - Morrison, Joseph Paul Eldred,
    Publication info: Washington,United States Govt. Print. Off.,1942.
    Contributed by: Smithsonian Libraries
    Subjects: Cyclophoridae  Latin America  Mollusks  
    BHL Collections: Smithsonian Libraries
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  3. Cyclophoridae, bearbeitet von dr. Wilhelm Kobelt ... Mit 110 abbildungen und 1 landkarte.
    By: Kobelt, Wilhelm,
    Publication info: Berlin,R. Friedländer und Sohn,1902.
    Contributed by: MBLWHOI Library, Woods Hole
    Subjects: Cyclophoridae  
    BHL Collections: MBLWHOI Library, Woods Hole
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