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  1. On Nectonema agile, Verrill / by Henry B. Ward.
    By: Ward, Henry Baldwin,
    Publication info: Cambridge :Printed for the Museum,1892.
    Contributed by: Harvard University, MCZ, Ernst Mayr Library
    Subjects: (Addison Emery),  1839-1926  Verrill, A. E  Worms  
    BHL Collections: Ernst Mayr Library of the MCZ, Harvard University
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