Caring for the earth.
| Awduron Corfforaethol: | , , |
|---|---|
| Fformat: | Llyfr |
| Iaith: | English |
| Cyhoeddwyd: |
Gland, Switzerland
IUCN-the World Conservation Union ; United Nations Environment Programme : World Wide Fund for Nature
c1991.
|
| Pynciau: |