000			00411nam a2200157Ia 4500
008			210716s1995 xx 000 0 und d
020			_a0534202446
041			_aeng
082			_a004.6 SHAW
100			_aShay, Wailliam A.
245			_aUnderstanding data communications and networks.
250			_a1
260			_aBoston _bPWS Publishing company _c1995
300			_axvi,600
650			_aComputer Networks
999			_c198930 _d198930