000			00330nam a2200133Ia 4500
008			210113s9999 xx 000 0 und d
082			_a004.6 WIL-D
100			_aWilliam Stallings
245			_aData and Computer Communications
250			_a10th
260			_bPearson Education _aNew Delhi _c2018
300			_a907
942			_cBK
999			_c54650 _d54650