Christiansen, John L., and Reeve M. Bailey. 1990.
The Snakes of Iowa
Nongame Technical Series No. 1. Des Moines, IA: Iowa Department of Natural Resources. 16 pp.




Christiansen, John L., and Reeve M. Bailey. 1991.
The Salamanders and Frogs of Iowa
Nongame Technical Series No. 2. Des Moines, IA: Iowa Department of Natural Resources. 24 pp.




Christiansen, John L., and Reeve M. Bailey. 1997.
The Lizards and Turtles of Iowa
Nongame Technical Series No. 3. Des Moines, IA: Iowa Department of Natural Resources. 20 pp.




Parmelee, Jeffrey R., Melinda G. Knutson, and James E. Lyon. 2002.
A Field Guide to Amphibian Larvae and Eggs of Minnesota, Wisconsin, and Iowa
Washington, DC: U. S. Geological Survey. 38 pp. [also available online here]