Caring for the earth.

Detalles Bibliográficos
Autores Corporativos:	International Union for Conservation of Nature and Natural Resources, World Wide Fund for Nature, United Nations Environment Programme
Formato:	Libro
Lenguaje:	English
Publicado:	Gland, Switzerland IUCN-the World Conservation Union ; United Nations Environment Programme : World Wide Fund for Nature c1991.
Materias:	Human ecology. Nature conservation. Sustainable development.