000 00295nam a2200121Ia 4500
008 160710s1997 xx 000 0 und d
082 _a004.6 HUG
100 _aHUGHES,L.
245 _aINTRODUCTION TO DATA COMMUNICATIONS
260 _bNAROSA PUB. HOUSE
_c1997
300 _a502
942 _2ddc
_cB
999 _c56353
_d56353