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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Westbroek, P. (Pieter), - Neijndorff, Ferry - Stel, Jan H
    Type: Article
    In: Palaeontology
    Volume: 18
    Date: 1975
    Page Range: 367--375
    Publication Info: London, Palaeontological Association, 1957-