00448nam a2200157Ia 4500003000400000005001700004008004100021020001800062040003800080082002300118100001100141245003900152250000900191260007800200300001200278OSt20251030170810.0211230s9999    xx            000 0 und d  a92-3-103341-7  cJayakar Knowledge Resource Centre  223a02.621bUNESCO  aUnesco 0aWorld information report 1977/1978  aN.d.  bUNITED NATIONS EDUCATIONAL SCIENTIFIC AND CULTURAL ORGANIZATaParisc1997  a390p p.