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  1. Mollusca. (Freshwater Gastropoda & Pelectpoda) By H.B. Preston.
    By: Preston, Hugh Berthon.
    Publication info: London :Taylor and Francis; [etc., etc.],1915.
    Contributed by: University of California Libraries (archive.org)
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  2. Mollusca. (Freshwater Gastropoda & Pelectpoda) By H.B. Preston.
    By: Preston, Hugh Berthon.
    Publication info: London,Taylor and Francis; [etc., etc.]1915.
    Contributed by: Smithsonian Libraries
    BHL Collections: Smithsonian Libraries
    View Book