Ngorongoro conservation and development project. Annual report of activities, February 1988-January 1989 1989 Perkin, Scott |
Revision of draft EIA procedure for Botswana. Report to IUCN - World Conservation Union 1989 Bisset, Ronald |
Report of environmental impact assessment training consultancy 1989 Bisset, Ronald | Cobham, Ralph O. | Driver, Paul |
Natural resource accounts for Botswana : environmental accounting for a natural resource-based economy 1989 Gilbert, Alison | Harrison, Anne | Pearce, David W. (David William) | Perrings, Charles |