000			00456nam a2200169Ia 4500
005			20220823172024.0
008			171212s9999||||xx |||||||||||||| ||und||
020			_a0131984667
082			_a004.6 B5618d
100			_aBlack, Uyless
245			_aData networks _bconcepts, theory, and practice
260			_aNew Jersey _bPrentice Hall _c1989
300			_axvi, 877p.
650			_aComputer networks
650			_aData transmission systems
942			_cDB
999			_c15163 _d15163