000 00271nam a2200121Ia 4500
008 220108s9999||||xx |||||||||||||| ||und||
100 _aH.K. Dass
245 0 _aMathematical Physics
260 _aDelhi
_bS.Chand
300 _a1216
650 _aMathematics
942 _cREF
999 _c19855
_d19855