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By: Siverson, MikaelType: ArticleIn: PalaeontologyVolume: 35Series:Issue:Date: 1992Page Range: 519--554Publication Info: London, Palaeontological Association, 1957-Subjects:
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By: Siverson, MikaelType: ArticleIn: PalaeontologyVolume: 39Series:Issue:Date: 1996Page Range: 813--849Publication Info: London, Palaeontological Association, 1957-Subjects: