Paperback
ISBN: 978-92-3-102671-3
ISBN-10: 92-3-102671-2
United Nations Educational Scientific and Cultural Organization (UNESCO) ยท 1990
| See also: | ||
| 1991 | Paperback | Records of the General Conference: 25th Session |
| 1990 | Paperback | Records of the General Conference: 25th Session |