000 00287nam a22001337a 4500
020 _a9788189979881
082 _a539
_bGUP/M
100 _aGupta,A.K.
245 _aModern physics
260 _aNew Delhi
_bPearl Books
_c2008
300 _a264p.
650 _aModern physics
942 _cBK
999 _c37165
_d37165