Caring for the earth.

书目详细资料
企业作者:	International Union for Conservation of Nature and Natural Resources, World Wide Fund for Nature, United Nations Environment Programme
格式:	图书
语言:	English
出版:	Gland, Switzerland IUCN-the World Conservation Union ; United Nations Environment Programme : World Wide Fund for Nature c1991.
主题:	Human ecology. Nature conservation. Sustainable development.