00321nam a2200133Ia 4500008004100000041000800041082001700049100001700066245003600083260002900119300000800148365001500156700001600171230718s9999    xx            000 0 und d  aeng  a621.381bMAR  aMarston R.M.  aTimer Generator Circuits Manual  c1993bB.P.B. Publication  a267  cRs.b60.00  aMarston R M