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By: Wilks, Chris M - Ketner, Pieter - Valkenburg, J. L. C. H. van (Johannes Leonardus Cornelis Hendrikus),Type: ArticleIn: AdansoniaVolume: 20Series: 4Issue: 1Date: 1998Page Range: 139--162Publication Info: Paris, Ed. scientifiques du Muséum, 1997-Subjects: