000			00308nam a2200133Ia 4500
001			4884
008			150525s9999 xx 000 0 und d
020			_a412 12850 0
100			_aBrown J
245			_aTelecommunications
250			_a2
260			_aLondon _bElbs & Chapman And Hall _c1974
300			_a,;ill.
999			_c34479 _d34479