Address by Federico Mayor at the opening of the International Forum on Sustainable Development, París, 23 September 1991 /
Address by Federico Mayor at the opening of the International Forum on Sustainable Development, París, 23 September 1991 /
United Nations Educational, Scientific and Cultura Organization.
- París : UNESCO, 1991.
- 6 p.
- DG 91 ; 28 .
Unesco
Unesco