11 November 1997 | Publisher: UN Educational, Scientific and Cultural Organisation (UNESCO) | Document type: Resolutions/Recommendations/Declarations
28 November 1978 | Publisher: UN Educational, Scientific and Cultural Organisation (UNESCO) | Document type: Resolutions/Recommendations/Declarations
19 November 1974 | Publisher: UN Educational, Scientific and Cultural Organisation (UNESCO) | Document type: Resolutions/Recommendations/Declarations