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By: Taylor, John D. - Morris, Noel J - Taylor, Cynthia NType: ArticleIn: PalaeontologyVolume: 23Series:Issue:Date: 1980Page Range: 375--409Publication Info: London, Palaeontological Association, 1957-Subjects:
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By: Howarth, Michael Kingsley - Morris, Noel JType: ArticleIn: Bulletin of the Natural History Museum. Geology seriesVolume: 54Series:Issue:Date: 1998Page Range: 1--32Publication Info: Andover, Intercept,Subjects: