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By: Freeman, Eric FType: ArticleIn: PalaeontologyVolume: 25Series:Issue:Date: 1982Page Range: 471--484Publication Info: London, Palaeontological Association, 1957-Subjects:
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By: Freeman, Eric FType: ArticleIn: PalaeontologyVolume: 22Series:Issue:Date: 1979Page Range: 135--166Publication Info: London, Palaeontological Association, 1957-Subjects: