Zyss, Witold Rene Maheu, Director General of UNESCO, 1961-1974: Recollections by his staff; tribute for the 25th anniversary of his death/ by Witold Zyss. - Paris: AAFU, 2000. - 222 p.; 24 cm. lamns. Pref. by Koichiro Matsuura. No. de Clasificación Universal Decimal: 341.16: 001 (100) =20 =40 "2000" ZYS.