000 00275nam a2200121Ia 4500
008 220201s1992 xx 000 0 eng d
082 _a4.6
_bHUG
100 _aHughes,Larry
245 0 _aData communication
260 _aNY
_bMcgraw Hill
_c1992
300 _a470
942 _2ddc
999 _c34553
_d34553