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