- E-bookAmphibians and Reptiles of the Rainforests of Southern El Petén, GuatemalaWilliam Edward Duellman
- E-bookAmphibians and Reptiles of the Rainforests of Southern El Petén, GuatemalaWilliam Edward Duellman
- E-bookA Distributional Study of the Amphibians of the Isthmus of Tehuantepec, MéxicoWilliam Edward Duellman
- E-bookA Review of the Frogs of the Hyla bistincta GroupWilliam Edward Duellman
- E-bookThe Amphibians and Reptiles of Michoacán, MéxicoWilliam Edward Duellman
- E-bookA Taxonomic Study of the Middle American Snake, Pituophis deppeiWilliam Edward Duellman
- E-bookA Review of the Middle American Tree Frogs of the Genus PtychohylaWilliam Edward Duellman
- E-bookThe Genera of Phyllomedusine Frogs (AnuraWilliam Edward Duellman
- E-bookDescriptions of New Hylid Frogs From Mexico and Central AmericaWilliam Edward Duellman
- E-bookA Distributional Study of the Amphibians of the Isthmus of Tehuantepec, MéxicoWilliam Edward Duellman
- E-bookA Review of the Frogs of the Hyla bistincta GroupWilliam Edward Duellman
- E-bookA Review of the Middle American Tree Frogs of the Genus PtychohylaWilliam Edward Duellman
- E-bookDescriptions of New Hylid Frogs From Mexico and Central AmericaWilliam Edward Duellman
- E-bookThe Amphibians and Reptiles of Michoacán, MéxicoWilliam Edward Duellman
- E-bookThe Genera of Phyllomedusine Frogs (AnuraWilliam Edward Duellman