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By: Arango, Angélica M. - López-Portillo, Jorge - Parra-Tabla, Victor - Hernández-Salazar, Laura T - Morales-Mávil, Jorge E. - Rico-Gray, VictorType: ArticleIn: Acta botánica mexicanaVolume:Series:Issue:Date: 2012-07-01Page Range:Publication Info:Subjects: extrafloral nectaries Mexico tritrophic systems Veracruz