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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Westermann, G. E. G. (Gerd Ernst Gerold), - Wang, Yigang
    Type: Article
    In: Palaeontology
    Volume: 31
    Date: 1988
    Page Range: 295--339
    Publication Info: London, Palaeontological Association, 1957-