000 00256nam a2200121Ia 4500
100 _aSubrahmanyam N
245 2 _aTextbook of Optics
250 _a21st
260 _c1994
_bS.Chand & Co.
_aNew Delhi
300 _axv+624
700 _aBrij Lal
942 _cBK
999 _c25331
_d25331