000			00398nam a2200145Ia 4500
008			220217s9999||||xx |||||||||||||| ||und||
020			_a981-240-050-8
082			_a005.71 SHA
100			_aShay, William, A _91331
245		0	_aUnderstanding data communicationand networks
250			_a2nd
260			_aBrooks cole _bBoston _c1999
300			_b350
650			_aDATA COMMUNICATION _91124
999			_c166224 _d166224