Sustainable agriculture in semi-arid areas : with special reference to the Tswapong Hills area in Botswana 1989 Manintveld, Kees |
Ecological grazing management : a development alternative for brittle environments - the case of Namibia 1989 Otzen, Uwe |
Transfrontier reserves for peace and nature : a contribution to human security 1993 Westing, Arthur H. |
Agrarian reform and grassroots development : ten case studies 1990 Proterman, R. L. | Temple, Mary N. | Hanstad, Timothy M. |
Towards sustainable development : fourteen case-studies prepared by African and Asian journalists for the Nordic Conference on Environment and Development at Saltsjöbaden, Stockholm, 8-10 May 1987 1987 Carim, Enver | Barnard, Geoffrey | Foley, Gerald |
Perspectives on biodiversity : case studies in genetic resource conservation and development 1993 Potter, Christopher S. | Cohen, J. I. | Janczeweski, D. |