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By: Cleal, Christopher J., - Zodrow, Erwin L.,Type: ArticleIn: PalaeontologyVolume: 32Series:Issue:Date: 1989Page Range: 837--882Publication Info: London, Palaeontological Association, 1957-Subjects:
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By: Zodrow, Erwin L., - Cleal, Christopher J.,Type: ArticleIn: PalaeontologyVolume: 36Series:Issue:Date: 1993Page Range: 65--79Publication Info: London, Palaeontological Association, 1957-Subjects: