- Libro electrónicoNorth American Recent Soft-shelled Turtles (Family Trionychidae)Robert G. Webb
- Libro electrónicoNorth American Recent Soft-Shelled Turtles (Family Trionychidae)Robert G. Webb
- Libro electrónicoA New Species of Frog (Genus Tomodactylus) from Western MexicoRobert G. Webb
- Libro electrónicoDescription of a New Softshell Turtle From the Southeastern United StatesRobert G. Webb
- Libro electrónicoSome Reptiles and Amphibians from KoreaGeorge W. Byers
- Libro electrónicoA New Species of Frog (Genus Tomodactylus) from Western MexicoRobert G. Webb
- Libro electrónicoSome Reptiles and Amphibians from KoreaGeorge W. Byers
- Libro electrónicoNorth American Recent Soft-Shelled Turtles (Family Trionychidae)Robert G. Webb