00450nam a22001697a 450000500170000001000150001702000270003203500140005903700090007308200140008210000160009624500380011226000340015027000650018430000200024949000110026920250529154819.0  aENG-145047  a9789388387507c1195.00  aEN-128579  bDBAD  a530.1521  aGupta, C.B.  aMathematical Physics/cC.B. Gupta  aNew DelhibWisdom Pressc2019  aMurari Lal Street, Ansari Road, DaryaganjbNew Delhie110002  a220p.c22cm(Hb)  vPart 3