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  1. By: Okamoto, Takashi
    Type: Article
    In: Palaeontology
    Volume: 31
    Date: 1988
    Page Range: 35--52
    Publication Info: London, Palaeontological Association, 1957-
  2. By: Okamoto, Takashi
    Type: Article
    In: Palaeontology
    Volume: 31
    Date: 1988
    Page Range: 281--294
    Publication Info: London, Palaeontological Association, 1957-
  3. By: Okamoto, Takashi - Shibata, Makoto
    Type: Article
    In: Paleontological research
    Volume: 1
    Date: 1997
    Page Range: 29--46
    Publication Info: Tokyo, Japan, Palaeontological Society of Japan, 1997-