00347nam a22001217a 450000500170000000800410001702000150005805000170007310000240009024500480011426000380016230000250020020260410133619.0260410b        |||||||| |||| 00| 0 eng d  a0470217197  aQC20.C4 1990  aP. K. Chattopadhyay  aMathematical physics /cP. K. Chattopadhyay  aNew yorkbJohn wiley & sonsc1990  axii, 352p, ;illbhbk