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By: Wright, Anthony David, - Nolvak, JaakType: ArticleIn: PalaeontologyVolume: 40Series:Issue:Date: 1997Page Range: 113--119Publication Info: London, Palaeontological Association, 1957-Subjects:
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By: Popov, Leonid - Nolvak, Jaak - Holmer, Lars EType: ArticleIn: PalaeontologyVolume: 37Series:Issue:Date: 1994Page Range: 627--650Publication Info: London, Palaeontological Association, 1957-Subjects: