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  1. Le genre Polygordius. Une monographie par Julien Fraipont.
    By: Fraipont, Julien,
    Publication info: Berlin,R. Friedländer & sohn,1887.
    Contributed by: Smithsonian Libraries
    Subjects: Annelida  Naples, Bay of (Italy)  Polychaeta  Polygordius  
    BHL Collections: Smithsonian Institution Libraries
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  2. Trochophora-Studien ... Von Dr. R. Woltereck.
    By: Woltereck, Richard,
    Publication info: Stuttgart,E. Nägele,1902-
    Contributed by: Smithsonian Libraries
    Subjects: Embryology  Polygordius  Worms  
    BHL Collections: Smithsonian Institution Libraries
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