Proceedings of the National Seminar on Environment and Development : a review of some environmental problems in Zambia
1979
Johnson, David S. |
Roder, Wolf |
Clark University, Program for International Development, US
Institutional models for managing Africa's environment : a case study of Sudan's Institute of Environmental Studies
1989
El Khalifa, M. D. |
Mohamed, Y. A. |
Ford, Richard B. |