000 00247nam a2200121Ia 4500
999 _c21962
_d21962
020 _a0074601385
100 _aAjoy Ghatak.
245 _aOptics
250 _a2
260 _c1995
_bTATA McGRAW HILL
_aNew Delhi
300 _axviii+694
942 _cBB