000 00248nam a2200109Ia 4500
008 220201s9999 xx 000 0 eng d
100 _aRATTAN (SUNITA)
245 0 _aENGG. CHEMISTRY
250 _a5TH
260 _bDELHI, S.K. KATARIA
942 _2ddc
999 _c99334
_d99334