000			00300nam a22001337a 4500
008			180226b xxu||||| |||| 00| 0 eng d
020			_a9780072964042
041			_aeng
080			_a004
100			_a28
101			_aSHK
245			_aData communications and networks _cMiller,D
942			_2udc _cBK
999			_c43416 _d43416