- E-bookA Taxonomic Revision of the Leptodactylid Frog Genus Syrrhophus CopeJohn D. Lynch
- E-bookGenera of Leptodactylid Frogs in MéxicoJohn D. Lynch
- E-bookGenera of Leptodactylid Frogs in MéxicoJohn D. Lynch
- E-bookSystematic Status of a South American Frog, Allophryne ruthveni GaigeHoward L. Freeman
- E-bookA Taxonomic Revision of the Leptodactylid Frog Genus Syrrhophus CopeJohn D. Lynch
- E-bookGenera of Leptodactylid Frogs in MéxicoJohn D. Lynch
- E-bookSystematic Status of a South American Frog, Allophryne ruthveni GaigeHoward L. Freeman
- E-bookSystematic Status of a South American Frog, Allophryne ruthveni GaigeJohn D. Lynch