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		No cover image available Address by Federico Mayor at the opening of the International Forum on Sustainable Development, París, 23 September 1991 / United Nations Educational, Scientific and Cultura Organization. by UNESCO. Director General. Series: DG 91 ; 28Material type: Text; Format: print ; Literary form: Not fiction Publication details: París : UNESCO, 1991Availability: Not available: UNESCO (1).
		No cover image available Education for peace : address by Federico Mayor on the occasion of his investiture as Doctor Honoris Causa of the Pontifical University of Salamanca, 6 May 1991 / UNESCO. by UNESCO. Director General. Series: DG 91 ; 18Material type: Text; Format: print ; Literary form: Not fiction Publication details: Salamanca [Esp.] : UNESCO, 1991Availability: Not available: UNESCO (1).