Address at the ceremony for presentation of the 1991 Sultan Qaboos Prize for Environmental Preservation (being awarded for the first time) : 1990 and 1991 Kalinga Prizes for the Popularization of Science : 1991 Science Prize : 1991 Javed Husain Prize for Young Scientists : 1991 Carlos J. Finlay Prize : Unesco, 28 October 1991 /
Mayor, Federico.
Unesco.
[Paris] : Unesco,
1991.
"DG/91/35"
Cover title.