000 00275nam a2200109Ia 4500
008 190719s9999 xx 000 0 und d
100 _aR.P.Chauhan & Others
245 0 _aOptics - I B.Sc.II sem III
260 _aN.D.
_bChronicle
_c2015
650 _aPhysics
942 _cBK
999 _c15216
_d15216