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  1. A monograph of the fresh-water polyzoa : including all the known species, both British and foreign / by George James Allman.
    By: Allman, George James,
    Publication info: London :Ray Society,1856.
    Holding Institution: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
    Subjects: Bryozoa  Ectoprocts  
    BHL Collections: Charles Darwin's Library
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