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  1. By: Moissette, Pierre - Spjeldnaes, Nils
    Type: Article
    In: Palaeontology
    Volume: 38
    Date: 1995
    Page Range: 771--799
    Publication Info: London, Palaeontological Association, 1957-
  2. By: Spjeldnaes, Nils
    Type: Article
    In: Palaeontology
    Volume: 6
    Date: 1963
    Page Range: 254--263
    Publication Info: London, Palaeontological Association, 1957-
  3. By: Spjeldnaes, Nils
    Type: Article
    In: Palaeontology
    Volume: 6
    Date: 1963
    Page Range: 121--131
    Publication Info: London, Palaeontological Association, 1957-