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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Lister, T R - Downie, C
    Type: Article
    In: Palaeontology
    Volume: 10
    Date: 1967
    Page Range: 171--174
    Publication Info: London, Palaeontological Association, 1957-
  2. By: Richardson, J B - Lister, T R
    Type: Article
    In: Palaeontology
    Volume: 12
    Date: 1969
    Page Range: 201--252
    Publication Info: London, Palaeontological Association, 1957-