Paperback
ISBN: 978-92-3-102726-0
ISBN-10: 92-3-102726-3
United Nations Educational Scientific and Cultural Organization (UNESCO) ยท 1991
| See also: | ||
| 1990 | Paperback | Records of the General Conference: 25th Session |
| 1990 | Paperback | Records of the General Conference: 25th Session |