000 00290nam a2200121Ia 4500
008 211126s9999 xx 000 0 und d
082 _a621.381
100 _aFRED HALSALL
245 0 _aDATA COMM.COMP. NETWORKS AND OPEN SYSTEMS
260 _bPEARSON
365 _b375.00
942 _cBTECH
999 _c131647
_d131647