TY  - BOOK
AU  - Duellman,William Edward
TI  - A Distributional Study of the Amphibians of the Isthmus of Tehuantepec, Mexico
PY  - 2011///
PB  - Project Gutenberg
N1  - Public domain in the USA; Electronic text
UR  - http://www.gutenberg.org/ebooks/38440
ER  -