A guide to the birds of Panama /
by Robert S. Ridgely ; illustrated by John A. Gwynne, Jr.
- Princeton, N.J. : Princeton University Press, c1976.
- xv, 394 p., [32] leaves of plates : ill. (some col.) ; 23 cm.
"Sponsored by the International Council for Bird Preservation (Pan American and United States Sections), with the support of the Marcia Brady Tucker Foundation." Includes index.