000 00276nam a2200121Ia 4500
080 _a19.01.05 C7581
245 _aWorking document
260 _bUnesco
_aCaracas
_c1984
300 _a19 leaves
583 _c11/28/06
_kJOYD
650 _aINFORMATION NETWORKS
942 _cM
_mC7581
999 _c30318
_d30318