00421nam a2200133 a 450000500170000002000150001708200160003210000170004824500820006526000480014730000240019549000430021970000250026220251203110241.0  a0521337420  a515.45bPOR  aPorter,David  aIntegral equationsbPractical treatment, from spectral theory to applications  aCambridgebCambridge university pressc1996  axi.372p.c22cm. PB.  aCambridge texts in applied mathematics  aStirling, David S.G.