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  1. 1

    Reptiles y anfibios / by O'Shea, Mark

    Published 2001
    Book
  2. 2

    Los anfibios : la rana y su crianza / by Freiberg, Marcos A.

    Published 1985
    Book
  3. 3

    Declive de las poblaciones de anfibios by Blaustein, Andrew R.

    Article
  4. 4

    Fauna amenazada / by Des Roche, Antonio

    Published 1989
    Book