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  1. By: Hershler, Robert - Liu, Hsiu-Ping. - Bradford, Corbin
    Type: Article
    In: ZooKeys
    Volume: 330
    Date: 2013
    Page Range: 27-52
    Publication Info: Sofia, Bulgaria Pensoft Publishers
    Subjects: California  Conservation  freshwater  Gastropoda  Hydrobiidae  Nevada  Pyrgulopsis  taxonomy  United States