00338nam a22001217a 4500008004100000020001500041050002500056100001600081245005000097260002900147300001500176650002500191210412b        xxu||||| |||| 00| 0 eng d  a0738201251  aQC20 b.W95 1999 c.1  aWyld, H.W.   aMathematical methods for physics cH. W. Wyld  aLondonbCRC press c1999  axiv, 628p.  amathematical physics