- Cărți electroniceThe Amphibians and Reptiles of Michoacán, MéxicoWilliam E. Duellman
- Cărți electroniceA Synopsis of Neotropical Hylid Frogs, Genus OsteocephalusWilliam E. Duellman
- Cărți electroniceNeotropical Hylid Frogs, Genus SmiliscaWilliam E. Duellman
- Cărți electroniceSystematic Status of the Colubrid Snake, Leptodeira discolor GuntherWilliam E. Duellman
- Cărți electroniceA Taxonomic Study of the Middle American Snake, Pituophis deppeiWilliam E. Duellman
- Cărți electroniceAmphibians and Reptiles of the Rainforests of Southern El Peten, GuatemalaWilliam E. Duellman
- Cărți electroniceA Review of the Frogs of the Hyla bistincta GroupWilliam E. Duellman
- Cărți electroniceMiddle American Frogs of the Hyla microcephala GroupWilliam E. Duellman
- Cărți electroniceThe Genera of Phyllomedusine Frogs (Anura Hylidae)William E. Duellman
- Cărți electroniceDescriptions of Two Species of Frogs, Genus Ptychohyla Studies of American Hylid Frogs, VWilliam E. Duellman
- Cărți electroniceSystematic Status of the Colubrid Snake, Leptodeira discolor GuntherWilliam E. Duellman
- Cărți electroniceA Review of the Middle American Tree Frogs of the Genus PtychohylaWilliam E. Duellman
- Cărți electroniceDescriptions of New Hylid Frogs From Mexico and Central AmericaWilliam E. Duellman
- Cărți electroniceA New Subspecies of Lizard, Cnemidophorus sacki, from Michoacan, MexicoWilliam E. Duellman
- Cărți electroniceA Synopsis of Neotropical Hylid Frogs, Genus OsteocephalusWilliam E. Duellman
- Cărți electroniceThe Amphibians and Reptiles of Michoacán, MéxicoWilliam E. Duellman
- Cărți electroniceThe Genera of Phyllomedusine Frogs (Anura Hylidae)William E. Duellman
- Cărți electroniceDescriptions of Two Species of Frogs, Genus Ptychohyla Studies of American Hylid Frogs, VWilliam E. Duellman
- Cărți electroniceA Distributional Study of the Amphibians of the Isthmus of Tehuantepec, MexicoWilliam E. Duellman