Cornell University Press · Princeton University Press
| title | ISBN-13 (ISBN-10)  | year of publica- tion  | other author(s) | 
|---|---|---|---|
| A Guide to the Birds of Panama: With Costa Rica, Nicaragua, and Honduras | 978-0-691-02512-4 (0-691-02512-6)  | 1992 | Robert S. Ridgely | 
| Wildlife Conservation Society Birds of Brazil: The Pantanal and Cerrado of Central Brazil | 978-0-8014-7646-4 (0-8014-7646-1)  | 2010 | Robert S. Ridgely · Guy Tudor · Martha Argel | 
A.G. · J. A. · J. G. · John A. · John G. · John Gwynne