000 00257nam a2200109Ia 4500
008 220201s1991 xx 000 0 eng d
100 _aGUPTA SANJEEV
245 0 _aOBJECTIVE PHYSICS
260 _aDELHI
_bSATYA PRAKASHAN
_c1991
300 _a356
942 _2ddc
999 _c91095
_d91095