000			00313nam a2200133Ia 4500
008			221030s9999 xx 000 0 und d
041			_aEnglish
082			_a105.23
100			_aU. D. Black
245		0	_aData Communications & Distributed Networks _cby U. D. Black
260			_c0
650			_aB
942			_cBK
999			_c12422 _d12422