00512nam a2200181Ia 4500 OSt 20251030170810.0 211230s9999 xx 000 0 und d 92-3-103341-7 Jayakar Knowledge Resource Centre 23 02.621 UNESCO Unesco 35958 World information report 1977/1978 N.d. UNITED NATIONS EDUCATIONAL SCIENTIFIC AND CULTURAL ORGANIZAT Paris 1997 390p p. 1 ddc 0 280595 280595 0 0 ddc 0 0 2 2 0000-00-00 020.621 UNESCO 393968 2022-01-12 0000-00-00 1