000 00285nam a2200121Ia 4500
008 220201s1988 xx 000 0 eng d
082 _a621.382
_bSCH
100 _aSchweber,William L
245 0 _aData communication
260 _aNY
_bMcgraw Hill
_c1988
300 _a564
942 _2ddc
999 _c34186
_d34186