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By: Barnes, Christopher R. (Christopher Richard), - Bergström, Stig M.,Type: ArticleIn: Bulletin of the British Museum (Natural History) GeologyVolume: 43Series:Issue:Date: 1988Page Range: 325--343Publication Info: London, BM(NH),Subjects:
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By: Goldman, Daniel - Bergström, Stig M.,Type: ArticleIn: PalaeontologyVolume: 40Series:Issue:Date: 1997Page Range: 965--1010Publication Info: London, Palaeontological Association, 1957-Subjects:
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By: Bergström, Stig M.,Type: ArticleIn: PalaeontologyVolume: 21Series:Issue:Date: 1978Page Range: 723--758Publication Info: London, Palaeontological Association, 1957-Subjects:
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By: Bergström, Stig M., - Boucot, Arthur JamesType: ArticleIn: Bulletin of the British Museum (Natural History) GeologyVolume: 43Series:Issue:Date: 1988Page Range: 273--284Publication Info: London, BM(NH),Subjects: