000 00259nam a2200109Ia 4500
008 230401s9999 xx 000 0 eng d
100 _asubramanyam (n), lal (b),
245 2 _aa text book of optics
250 _a2000
260 _bS. CHAND
942 _2ddc
_cBTECH
999 _c5933
_d5933