000 00249nam a2200109Ia 4500
008 220201s1988 xx 000 0 eng d
100 _aSCHWEBER, W.L.
245 0 _aDATA COMMUNICATION
260 _bMC-GRAW HILL
_c1988
300 _a564
942 _2ddc
999 _c67691
_d67691