000 00242nam a2200109Ia 4500
008 230401s9999 xx 000 0 eng d
100 _aGUPTA SL & S
245 0 _aMODERN PHYSICS
250 _a2000
260 _bDHANPAT RAI
942 _2ddc
_cBTECH
999 _c3159
_d3159