000			00364nam a2200169Ia 4500
008			240220s9999 xx 000 0 und d
041			_aENG
100			_aCarlson B. A.
245		0	_aCommunication system
260			_aNULL
260			_bMcgraw Hill International.
260			_c1986
300			_a686p.
365			_b282.2
650			_aETC
942			_cDBK
999			_c21182 _d21182