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  1. By: Piedra-Malagón, Eva María - Ramírez Rodríguez, Rolando - Ibarra-Manríquez, Guillermo
    Type: Article
    In: Acta Botánica Mexicana
    Volume: 75
    Date: 2006
    Page Range: 45--75
    Publication Info: México, Instituto de Ecología, A C, 1988-