000 00253nam a2200109Ia 4500
003 LDD
040 _cLDD
245 0 _aChemistry
_h[computer files]
_bComputer based teaching
260 _aNew Delhi
_bUnesco
901 _a1254
_b03-03-1998
942 _2ddc
_cCD
999 _c150277
_d150277