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  1. By: Barriga, Horalia Diaz - Guevara-Féfer, Fernando - Valenzuela-Garza, Ricardo
    Type: Article
    In: Acta Botánica Mexicana
    Volume: 2
    Date: 1988
    Page Range: 21--44
    Publication Info: México, Instituto de Ecología, A C, 1988-