Efficiency and substitution in pollution abatement : three case studies 1992 Anderson, Dennis | Cavendish, William |
Solar pumping : an introduction and update on the technology, performance, costs and economics 1993 Barlow, Roy |
Environment and development in Africa : selected case studies 1991 Blackwell, Jonathan | Goodwillie, Roger N. | Webb, Richard |
Desertification control and renewable resource management in the Sahelian and Sudanian regions fo West Africa 1987 Falloux, François | Mukendi, Aleki |
Desertification in the Sahelian and Sudanian zones of West Africa 1987 Gorse, Jean-Eugene | Steeds, David R. |
The causes, nature and rate of soil degradation in the Northernmost States of Nigeria and an assessment of the role of fertiliser in counteracting the process of degradation 1989 Mortimore, Michael |
Living with wildlife : wildlife resource management with local participation in Africa 1990 Kiss, Agnes |