00321nam a2200133Ia 4500008004100000041000800041082001500049100001700064245003700081260002900118300000800147365001500155700001700170230612s9999    xx            000 0 und d  aeng  a621.38 MAR  aMarston R.M.  aElectronic Alarm Circuits Manual  c1993bB.P.B. Publication  a123  cRs.b36.00  aMarston R.M.