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By: Benton, Michael J., - Walker, Alick DType: ArticleIn: PalaeontologyVolume: 28Series:Issue:Date: 1985Page Range: 207--234Publication Info: London, Palaeontological Association, 1957-Subjects:
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By: Benton, Michael J., - Walker, Alick DType: ArticleIn: PalaeontologyVolume: 39Series:Issue:Date: 1996Page Range: 763--782Publication Info: London, Palaeontological Association, 1957-Subjects: