00270nam a2200109Ia 450000500170000008000180001724500380003526000260007330000070009950000350010658300190014120260716043254.0  a18.01.01 W925  aWorld science report.... -[19  ]-  bUNESCOaParisFRc19--  av.  aDocumentation Centre has: 1993  c3/7/00kM2LMGR