Seventeenth session of the General Assembly of IUCN and seventeenth IUCN technical meeting, San José, Costa Rica, 1-10 February 1988 : proceedings
1988
IUCN
IUCN Regional Office for Southern Africa : prospectus
1988
Jones, David |
Bass, Christine |
IUCN Regional Programme for Central America
1988
Ashuvud, Johan |
The botanic gardens conservation strategy
1989
Heywood, Vernon |
