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By: Barskov, I. S. (Igorʹ Sergeevich), - Denis, Alain - Dauphin, Yannicke - Kiyashko, Serguei IType: ArticleIn: GéodiversitasVolume: 19Series: 4Issue: 4Date: 1997Page Range: 669--680Publication Info: Paris, Editions scientifiques du Muséum, 1997-Subjects: