000 00315nam a2200121Ia 4500
008 240112s9999 xx 000 0 und d
082 _aGUP-M
_b530.15
100 _aGupta, B D
245 0 _aMathematical physics
260 _a New Delhi
_bVani Educational Books
_c1978
650 _aMathematical physics
942 _cBK
999 _c29586
_d29586