For more information

Amphibian species of the world
http://research.amnh.org/vz/herpetology/amphibia/index.php
 

Amphibian web
http://amphibiaweb.org/aw/about/index.html  

Herpetological collection databases
http://www.herpnet.org/ 

Partners in Amphibian and Reptile Conservation
http://www.parcplace.org
 

Pennsylvania Herpetological Atlas
http://www.paherpatlas.org/
 

Reptile species of the world
http://www.reptile-database.org/ 

The Center for North American Herpetology
http://www.cnah.org/index.asp 

Turtles of the world
http://emys.geo.orst.edu/default.html