Volume 13, No. 2, pp. 19-72, pls. 1-8, 3 figs.

August 16, 1960

A Distributional Study of the Amphibians of the Isthmus of Tehuantepec, México

BY WILLIAM E. DUELLMAN

UNIVERSITY OF KANSAS LAWRENCE 1960

UNIVERSITY OF KANSAS PUBLICATIONS MUSEUM OF NATURAL HISTORY