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  1. By: Duellman, William E. (William Edward), - Simmons, John E
    Type: Article
    In: Proceedings of the Biological Society of Washington
    Volume: 90
    Date: 1977
    Page Range: 60--65
    Publication Info: Washington, Biological Society of Washington,
  2. By: Almendáriz, Ana - Simmons, John E - Brito M., Jorge - Vaca-Guerrero, Jorge
    Type: Article
    In: Amphibian & reptile conservation
    Volume: 8
    Date: 2014
    Page Range: 45--64
    Publication Info: Provo, Utah Amphibian & Reptile Conservation [1996-
  3. By: Simmons, John E
    Type: Article
    In: The Biological bulletin
    Volume: 121
    Date: 1961-12-01
    Page Range: 535--546
    Publication Info: Woods Hole, Mass Marine Biological Laboratory