Economic values of protected areas : guidelines for protected area managers /
IUCN World Commission on Protected Areas.
International Union for Conservation of Nature and Natural Resources.
IUCN World Commission on Protected Areas.Task Force on Economic Benefits of Protected Areas.
International Union for Conservation of Nature and Natural Resources.Economics Service Unit.
Gland ; Cambridge : IUCN,
1998.
On t.p.: World Commission on Protected Areas.
Includes bibliographical references.
Protected areas
Protected areas
Protected areas
Protected areas