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By: Whitworth, Peter H.Type: ArticleIn: PalaeontologyVolume: 13Series:Issue:Date: 1970Page Range: 100--111Publication Info: London, Palaeontological Association, 1957-Subjects:
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By: Whitworth, Peter H.Type: ArticleIn: PalaeontologyVolume: 12Series:Issue:Date: 1969Page Range: 406--413Publication Info: London, Palaeontological Association, 1957-Subjects: