Yazar
David Yanggen
2 cilt bulundu.
Cilt sonuçları
Los plaguicidas
David Yanggen, Charles C. Crissman · Centro Internacional de la Papa
198 sayfa · 2003
Control / Pesticides / Potatoes / Diseases and pests / Environmental aspects
Landscape-scale conservation in the Congo Basin
David Yanggen, Kenneth Angu, Nicodème Tchamou, Marcelin Agnagna · IUCN
262 sayfa · 2010
Central African Regional Program for the Environment / Land use / Planning / Conservation of natural resources / Landscape protection