000			003630000a22001570004500
245			_aPrinciples of data communication
100			_aLucky, R.W.
100			_aSalz, J.
100			_aWeldon, E.J.
260			_aNew York _bMcGraw-Hill _c1968
300			_aviii, 433p. : ill.
020			_a070389608
080			_a621.391 _bL8
041			_aEN
942			_cBK
999			_c92811 _d92811