00331nam a22001097a 4500020001800000040000900018082001800027100002000045245005500065260004600120650005500166  a9780132182260  cNust  a515.35bEDW'D  aC.H Edwards, Jr  aDifferential equations and boundary value problems  aUSA:bPrentice Hall International,c1996.  aDifferential equations and boundary value problems