Field guide to the birds of Machu Picchu and the Cusco region
Autor:Walker, BarryA field guide to the birds of the Machu Picchu historical sanctuary, Peru
Autor:Walker, BarryGuía de campo de aves de Machu Picchu, Perú
Autor:Walker, BarryA field guide to the birds of the Machu Picchu historical santuary, Peru
Autor:Walker, Barry