Author
UNESCO. Executive Board. Special session, 4th, 1985
1
UNESCO. General Conference, 21st, Belgrade, 1980
7
UNESCO. General Conference, 22nd, 1983
3
UNESCO. General Conference, 23rd, 1985
4
UNESCO. General Conference, 24th, 1987
7
UNESCO. General Conference, 25th, 1989
3
UNESCO. General Conference, 26th, 1991
3
UNESCO. General Conference, 28th, 1995
5
UNESCO. General Conference, 29th, 1997
5
UNESCO. General Conference, 4th Extraordinary Session, 1982
4