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  1. Ueber die Silur-Cephalopoden aus den mecklenburgischen Diluvialgeschieben / Hugo Rüdiger.
    By: Rüdiger, Hugo,
    Publication info: Güstrow :Michaal & Schuster,1889.
    Contributed by: Harvard University, MCZ, Ernst Mayr Library
    BHL Collections: Ernst Mayr Library of the MCZ, Harvard University
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