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  1. By: Wellstead, Carl F.
    Publication info: 1991
    Holding Institution: American Museum of Natural History Library
  1. By: Wellstead, Carl F.
    Type: Article
    In: Palaeontology
    Volume: 25
    Date: 1982
    Page Range: 193--208
    Publication Info: London, Palaeontological Association, 1957-