LITERATURE CITED
- Duellman , W. E. , ed. 1999 . Patters of Distribution of Amphibians A Global Perspective 633 Baltimore : Johns Hopkins University Press .
- Holman , J. A. 1995 . Pleistocene Amphibians and Reptiles in North America 243 New York : Oxford University Press .
- Rocek , Z. 1994 . A review of the fossil Caudata of Europe . Abhandlungen und Berichte fur Naturkunde , 17 : 51 – 56 .