The environmental future :
The environmental future : proceedings of the first International Conference on Environmental Future, held in Finland from 27 June to 3 July 1971 /
edited by Nicholas Polunin.
- London : Macmillan, 1972.
- xiv, 660 p. :
0333134559
Human ecology
304.28 / En
0333134559
Human ecology
304.28 / En