Evaluation of the Sahel - Sudan - Ethiopia Programme 1986-90 : field studies, Ethiopia, Tigray and Eritrea 1992
The conservation of wetlands in Tanzania : a case study of Lake Manyara National Park 1983 El-Attar, Abdel-Gawad A. |
From soil conservation to land husbandry : guidelines based on SIDA's experience 1993 Lundgren, Lill | Taylor, Geoff |
The economic value of species information and its role in biodiversity conservation : case studies of Costa Rica's National Biodiversity Institute and pharmaceutical prospecting 1993 Aylward, Bruce A. | Echeverría, Jaime |
Préservation du milieu naturel et développement économique en Tunisie : cas du parc national de l'Ichkeul 1984 El Ghezal, Abdelkader Ben Mohamed |
Recherche et développement en agriculture : développement en zones arides 1980 Billaz, R, | Dufumier, M. |