00349nam a2200133Ia 4500008004100000041000800041082001500049100001400064245005800078260002200136300002600158365001700184700001400201230718s9999    xx            000 0 und d  aeng  a623.7bBEA  aBeam W.R.  aCommand Control And Communications System Engineering  c1989bMcgraw Hill  a336dRef 489 E (9369)  cRs.b2474.70  aBeam W.R.