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By: Watson, Joan - Fisher, Helen L - Hall, Nicola AType: ArticleIn: PalaeontologyVolume: 31Series:Issue:Date: 1988Page Range: 1029--1031Publication Info: London, Palaeontological Association, 1957-Subjects:
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By: Fisher, Helen L - Watson, JoanType: ArticleIn: Bulletin of the British Museum (Natural History) GeologyVolume: 37Series:Issue: 3Date: 1983-11-24Page Range: 99--104Publication Info: London, BM(NH),Subjects:
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By: Watson, Joan - Fisher, Helen LType: ArticleIn: PalaeontologyVolume: 27Series:Issue:Date: 1984Page Range: 719--727Publication Info: London, Palaeontological Association, 1957-Subjects: