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  1. Beitrag zur entwicklungsgeschichte der seeigellarven / von dr. August Krohn.
    By: Krohn, August David,
    Publication info: Heidelberg :J. Groos,1849.
    Contributed by: Harvard University, MCZ, Ernst Mayr Library
    BHL Collections: Ernst Mayr Library of the MCZ, Harvard University
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  2. Beiträge zur Entwickelungsgeschichte der Pteropoden und Heteropoden / Von Dr. August Krohn.
    By: Krohn, August David,
    Publication info: Leipzig :W. Engelmann,1860.
    Contributed by: MBLWHOI Library
    BHL Collections: MBLWHOI Library, Woods Hole
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