000			00000nam a2200000 a 4500
005			20251203091243.0
082			_a621.38 _bRED
100			_aRoddy, Dennis _d_
100			_aCoolen, John _d_
245			_aElectronic communications
250			_a3rd ed.
260			_aPHI _c1987
300			_axii, 788 p.
964			_b _c _d _e _f _g_
997			_a41127 C
999			_c35567 _d35567