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By: Zarazúa, Graciela - Tejeda Vega, Samuel - Ávila-Pérez Pedro - Carapia, Leticia - Carreño, Carmen - Balcázar García, Miguel.Type: ArticleIn: Revista internacional de contaminación ambientalVolume:Series:Issue:Date: 2011-08-01Page Range:Publication Info:Subjects: heavy metals River sediments scanning electronic microscopy X-ray fluorescence