World directory of environmental organizations : a handbook of national and international organizations and programs--governmental and non-governmental--concerned with protecting the earth's resources /
Trzyna, Thaddeus C.
Childers, Roberta.
International Union for Conservation of Nature and Natural Resources.cn
Sierra Club.cn
Sacramento, Calif. : California Institute of Public Affairs in cooperation with the Sierra Club and IUCN-The World Conservation Union,
1992.
Includes indexes.
Conservation of natural resources
Environmental protection