Conservation of coastal and marine ecosystems and living resources of the East African region
1982
IUCN
Sustainable agriculture
1993
Sandhu, G. R. |
Significant trade in wildlife : a review of selected species in CITES Appendix II
1988
Broad, Steven |
Jenkins, Martin |
Luxmoore, R. A. |
Natural resource accounts for Botswana : environmental accounting for a natural resource-based economy
1989
Perrings, Charles |
Gilbert, Alison |
Pearce, David W. (David William) |
Harrison, Anne |
Sustainable development : learning for tomorrow's world : international conference on environmental education, Bo, Telemark, Norway, June 8-10 1988 : report
1988
Fjortoft, Ingunn |
Halle, Per Kristian |