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By: Paris, Florentin - Grahn, YngveType: ArticleIn: PalaeontologyVolume: 39Series:Issue:Date: 1996Page Range: 629--649Publication Info: London, Palaeontological Association, 1957-Subjects:
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By: Grahn, YngveType: ArticleIn: Bulletin of the British Museum (Natural History) GeologyVolume: 43Series:Issue:Date: 1988Page Range: 317--323Publication Info: London, BM(NH),Subjects: