000 00428nam a22001697a 4500
008 170218
020 _a010142293
040 _aSidma Library
050 _aTK5105 .H35d 1996
_b000223
100 _dFred Halsall
245 _aDATA COMMUNICATIONS, COMPUTER NETWORKS AND OPEN SYSTEM
250 _a4th
260 _aEngland
_bADDISON-WESLEY
_c1996
300 _a907p, 25cm
650 _2DAta Transmission Systems
942 _2lcc
999 _c2286
_d2286