00393nam a22001457a 4500003001200000005001700012008004100029020001500070040001200085082001700097100002300114245006800137250001100205650003100216NUST - PNEC20170116180829.0150728b        xxu||||| |||| 00| 0 eng d  a0070108811  cLIBRARY  a515.2433 CHU  a Churchill, Ruel V  a Fourier series and boundary value problems.cRuel V. Churchill  a4th ed  aBoundary value problemsx-