000			00374nam a2200145Ia 4500
999			_c22329 _d22329
008			190711s9999 xx 000 0 und d
020			_a0672270161
082			_a621.382 C226
100			_aCannon, Don, L.
100			_aLuecke, Gerald.
245		0	_aUnderstanding Communications Systems
260			_aIndianapolis _bSams Publishing _c1984
300			_a23X18
942			_cBK