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By: González, Humberto E. - Daneri, Giovanni - Menschel, E - Marchant, Margarita - Pantoja, S - Hebbeln, D - Barria, C - Vera, Rodrigo - Iriarte, José LuisType: ArticleIn: Gayana (Concepción)Volume:Series:Issue:Date: 2006-10-01Page Range:Publication Info:Subjects: