00281nam a22001097a 4500020001800000040000900018082001600027100002400043245002800067260004800095650002800143  a9780471135968  cNust  a515.35bBOR  aRobert  L. Borrelli  aDifferential equations   aNew York:bJohn Willey and sons inc,c1996.  aDifferential equations