00354nam a2200121Ia 4500020001800000082001700018100002200035245006600057250000800123260006500131300000900196650002700205  a9780071128070  a515.35 SIM/D  aSimmons, George F 0aDifferential equations with applications and historical notes  a2nd  bTata Mcgraw Hill Publishing Company LimitedaNew Delhic1979  a629p  aDifferential Equations