Oldfield, Barney, and John J. Moriarty. 1994.
Amphibians and Reptiles Native to Minnesota
Minneapolis, MN: University of Minnesota Press. 237 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]




Tekiela, Stan. 2003.
Reptiles and Amphibians of Minnesota Field Guide Cambridge, MN: Adventure Publications. 164 pp. [includes CD of frog and toad calls]