000 00336nam a2200157Ia 4500
008 230913s9999 xx 000 0 und d
082 _a530.1 gup
100 _aGupta, B D
245 0 _aMathematical Physics
250 _aII
260 _aNEW DELHI
260 _bVIKAS
260 _c2000
300 _a15.149
650 _aPhysics
999 _c151873
_d151873