Only one earth : the care and maintenance of a small planet : an unofficial report commissioned by the Secretary-General of the United Nations Conference on the Human Environment prepared with the assistance...

ανά Ward, Barbara
Έκδοση 1972

Human settlements : the environmental challenge : a compendium of United Nations Papers prepared for the Stockholm Conference on the Human Environment 1972 /

Έκδοση 1974

Man's impact on the global environment : assessment and recommendations for action : report /

Έκδοση 1970