- 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 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
- EbookThe Amphibians and Reptiles of Michoacán, MéxicoWilliam Edward Duellman
- EbookA Taxonomic Study of the Middle American Snake, Pituophis deppeiWilliam 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
- 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
- EbookDescriptions of New Hylid Frogs From Mexico and Central AmericaWilliam Edward Duellman
- EbookThe Amphibians and Reptiles of Michoacán, MéxicoWilliam Edward Duellman
- EbookThe Genera of Phyllomedusine Frogs (AnuraWilliam Edward Duellman