000 00309nam a2200145Ia 4500
008 220421s9999||||xx |||||||||||||| ||und||
020 _c325
040 _aET
100 _aSUBRAHMANIYAM N
245 0 _aOPTICS
260 _bS.CHAND PUBLICATION
_aNEW DELHI
300 _a668
500 _a8142
942 _cBK
999 _c14473
_d14473