Siehe Organisation der Vereinten Nationen für Bildung, Wissenschaft und Kultur, Records of the General Conference, Twenty-first Session, Belgrade, 23 September to 28 October 1980, Vol. 1, Resolutions, Abschnitt III.4, Resolution 4/21.
See United Nations Educational, Scientific and Cultural Organization, Records of the General Conference, Twenty-first Session, Belgrade, 23 September to 28 October 1980, vol. 1, Resolutions, sect. III.4, resolution 4/21.