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040 _aMAIN
041 _aEnglish
082 _a004.6
_bBAL N9:P7:P8
100 _aBlack, U.D.
245 0 _aData communication and distributed Networks
_cU.D.Black
250 _a3rd
260 _aNew Delhi
_bPrentice Hall Pub.
_c1999:2007:2008
300 _axviii,426
650 _aComputer Networks
650 _aData Transmission systems
942 _cBK
999 _c3541
_d3541