00394nam a2200133Ia 4500008004100000041000800041082001500049100001600064245009700080260004300177300000800220365001600228700001600244230718s9999    xx            000 0 und d  aeng  a004.6bAXL  aAxleson J .  aSerial Port Complete Programming And  Circuits For RS-232  And  Rs - 485  Links And Networks  c1998bPenram International Publication  a306  cRs.b300.00  aAxleson J .