000 00230nam a2200097Ia 4500
008 230401s9999 xx 000 0 eng d
100 _agupta(sl), gupta(cs),
245 0 _aMODERN PHYSICS
260 _bDHANPAT RAI
942 _2ddc
_cBTECH
999 _c4020
_d4020