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