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  1. Die Stephanoceras-Verwandten in den Coronatenschichten von Norddeutschland / von Erich Mascke.
    By: Maske, Erich,
    Publication info: Alfeld :P. Dobler,[1906]
    Contributed by: Harvard University, MCZ, Ernst Mayr Library
    BHL Collections: Ernst Mayr Library of the MCZ, Harvard University
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