Organisation der Vereinten Nationen für Erziehung, Wissenschaft und Kultur, Records of the General Conference, Sixteenth Session, Paris, 12 October-14 November 1970, Vol. 1: Resolutions, S.
United Nations Educational, Scientific and Cultural Organization, Records of the General Conference, Sixteenth Session, Paris, 12 October14 November 1970, vol. 1: Resolutions, p. 135.