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By: Francis, Jane EType: ArticleIn: PalaeontologyVolume: 26Series:Issue:Date: 1983Page Range: 277--294Publication Info: London, Palaeontological Association, 1957-Subjects:
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By: Francis, Jane EType: ArticleIn: PalaeontologyVolume: 29Series:Issue:Date: 1986Page Range: 665--684Publication Info: London, Palaeontological Association, 1957-Subjects: