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By: Sellwood, B WType: ArticleIn: PalaeontologyVolume: 15Series:Issue:Date: 1972Page Range: 125--157Publication Info: London, Palaeontological Association, 1957-Subjects:
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By: Sellwood, B WType: ArticleIn: PalaeontologyVolume: 14Series:Issue:Date: 1971Page Range: 589--591Publication Info: London, Palaeontological Association, 1957-Subjects: