000 00283nam a2200133Ia 4500
100 _aGupta/B.D
942 _cBK
654 _amathematics
245 _aMathematical Physics
260 _bVikas pub.
_aNew Delhi
_c1988
082 _a530.15
_bGUP
300 _a1238
546 _aENGLISH
999 _c28757
_d28757