000 00287nam a2200121Ia 4500
008 130409s9999 xx 000 0 und d
100 _aN. SUBRRAMANYAM
245 _aT.B OF OPTICS
260 _bS. Chand, New Delhi
_c1989
300 _a612
650 _aPhysics
_bB.SC.
942 _2ddc
_cBK
999 _c12923
_d12923