A guide to the bird of Panama /

by Ridgely, Robert S.
Published 1981

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

by Ridgely, Robert S.
Published 1989

The birds of South America /

by Ridgely, Robert S
Published 1989

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

by Ridgely, Robert S.
Published 1993

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

by Ridgely, Robert S.
Published 1993

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

by Ridgely, Robert S.
Published 1993

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

by Ridgely, Robert S.
Published 1993

A guide to the birds of Panamá /

by Ridgely, Robert S.
Published 1976

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

by Ridgely, Robert S.
Published 1993

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 Gwynne, John A. | Ridgely, Robert S.
Published 1993

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

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

South American Birds : a photographic aid to identification /

by Dunning, John S.
Published 1987

South American land birds : a photographic aid to identification /

by Dunning, John Stewart 1906-1987
Published 1982