000			00323nam a2200145Ia 4500
008			220421s9999||||xx |||||||||||||| ||und||
020			_c160
040			_aET
100			_aVERMA DINESH
245		0	_aDATA COMMUNICATIONAND NETWORKS MCS-42
260			_bG.H PUB. _aDELHI
300			_a310
500			_a17490
942			_cBK
999			_c23719 _d23719