00412nam a22001457a 4500020001800000082002000018100002100038245007300059250001200132260002800144300001900172650002700191650002800218700002000246  a9788131728222  a515.35  bEDW/D  aEdwards, Henry C  aDifferential equations and boundary value problems/cHenry C Edwards  a3rd ed.  aNoida:bPearson,c2004.  a801p. ;b25cm.  aDifferential Equations  aBoundary Value Problems  aPenney, David E