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  1. By: Palma, Alejandro - Figueroa, Ricardo - Ruiz, Víctor H. - Araya, Elizabeth. - Berríos, Patricia A.
    Type: Article
    In: Gayana (Concepción)
    Date: 2002-01-01
  2. By: Murillo H., Vladimir - Ruiz, Víctor H.
    Type: Article
    In: Gayana (Concepción)
    Date: 2002-01-01