Siehe United Nations Educational, Scientific and Cultural Organization, Records of the General Conference, Twenty-first Session, Belgrade, 23 September-28 October 1980, Vol. I, Resolutions, Abschn. III.4, Resolution 4/21.
See United Nations Educational, Scientific and Cultural Organization, Records of the General Conference, Twenty-first Session, Belgrade, 23 September-28 October 1980, vol. l, Resolutions, sect. III.4, resolution 4/21.