A guide to the birds of Panama with Costa Rica, Nicaragua, and Honduras /

by Ridgely, Robert Sterling 1946-
Published 1989

A guide to the birds of Panama /

by Ridgely, Robert Sterling 1946-
Published 1976

Guía de las aves de Panamá incluyendo Costa Rica, Nicaragua y Honduras /

by Ridgely, Robert Sterling 1946-, Gwynne, John A.
Published 1993

South American land birds : a photographic aid to identification /

by Dunning, John Stewart 1906-1987
Published 1982