East Usambaras agricultural development and environmental conservation project. A proposal for phase II, July 1990-June 1993 1990
Republic of Uganda. Sustainable development and forest conservation project, phase I final report 1990
Programme de gestion des ressources naturelles dans le sud-Burkina, plan directeur. Phase préparatoire 01.01.1990-30.06.91 1990
Proyecto : fortalecimiento institucional para el manejo de dos areas protegidas en la llanura amazonica ecuatoriana 1990 Imbach, Alejandro | Castello, Luis |
The application of conservation science to sustainable development. Report to : Département Fédéral des Affaires Etrangères, Directorate for Development Cooperation and Humanitarian Aid, Bern 1990