Guía de la vida silvestre de Chaparrí = A guide to the wildlife of Chaparri
Autor:Plenge, Heinz; Williams, RobGuía de la vida silvestre de Chaparrí = A guide to the wildlife of Chaparrí
Autor:Plenge Sánchez, HeinzAves de las nubes = Birds of the clouds
Autor:Valqui Haase, Thomas Holger; Plenge Sánchez, Heinz; Williams, Rob; Altamirano, José