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  1. The Integument of the Marine Echiuran Worm Urechis caupo
    By: Menon, J G - Arp, A J
    Type: Article
    In: The Biological bulletin.
    Volume: 185
    Date: 1993-12-01
    Page Range: 440--454
    Publication info: Woods Hole, Mass. :Marine Biological Laboratory,
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