000			00333nam a2200133Ia 4500
001			8840
008			150525s9999 xx 000 0 und d
020			_a0 672 27270 9
100			_aFriend George
245			_aUnderstanding Data Communications
250			_a0
260			_aIndiana _bHoward W. Sams & Company _c1988
300			_a,;ill.
999			_c40745 _d40745