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By: Parsons, C FType: ArticleIn: PalaeontologyVolume: 18Series:Issue:Date: 1975Page Range: 191--205Publication Info: London, Palaeontological Association, 1957-Subjects:
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By: Parsons, C FType: ArticleIn: PalaeontologyVolume: 20Series:Issue:Date: 1977Page Range: 101--118Publication Info: London, Palaeontological Association, 1957-Subjects: