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  1. By: Echenique, Ricardo O. - Guarrera, Sebastian A
    Type: Article
    In: Gayana
    Volume: 51
    Date: 1994
    Page Range: 57--68
    Publication Info: [Concepción] Chile, Instituto Central de Biología, Universidad de Concepción, 1961-
  2. By: Guarrera, Sebastian A - Echenique, Ricardo O.
    Type: Article
    In: Cryptogamie. Algologie
    Volume: 12
    Issue: 2
    Date: 1991
    Page Range: 101--107
    Publication Info: Paris, ADAC, 1980-2018
  3. By: Guarrera, Sebastian A - Echenique, Ricardo O.
    Type: Article
    In: Cryptogamie. Algologie
    Volume: 13
    Issue: 4
    Date: 1992
    Page Range: 257--272
    Publication Info: Paris, ADAC, 1980-2018
  4. By: Guarrera, Sebastian A - Echenique, Ricardo O.
    Type: Article
    In: Cryptogamie. Algologie
    Volume: 13
    Issue: 1
    Date: 1992
    Page Range: 31--38
    Publication Info: Paris, ADAC, 1980-2018
  5. By: Palacio, Hilda M - Palacio, Jaime A - Echenique, Ricardo O. - Sant'Anna, Célia Leite - Ramírez Restrepo, John Jairo
    Type: Article
    In: Boletín de la Sociedad Argentina de Botánica
    Date: 2015-09-01
    Publication Info: Boletín de la Sociedad Argentina de Botánica
  6. By: Echenique, Ricardo O. - Guerrero, José M.
    Type: Article
    In: Gayana. Botánica
    Date: 2004-01-01
  7. By: Echenique, Ricardo O. - Arenas, Patricia M
    Type: Article
    In: Gayana
    Volume: 51
    Date: 1994
    Page Range: 89--104
    Publication Info: [Concepción] Chile, Instituto Central de Biología, Universidad de Concepción, 1961-