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  1. By: San Martin, Cristina - Ramirez, Carlos - San Martín, José - Villaseñor Castro, Rodrigo‏
    Type: Article
    In: Gayana
    Volume: 58
    Date: 2001
    Page Range: 31--46
    Publication Info: [Concepción] Chile, Instituto Central de Biología, Universidad de Concepción, 1961-
  2. By: Ramirez, Carlos - San Martin, Cristina - Keim, Maria Luisa
    Type: Article
    In: Gayana
    Volume: 54
    Date: 1997
    Page Range: 19--30
    Publication Info: [Concepción] Chile, Instituto Central de Biología, Universidad de Concepción, 1961-