000 00325nam a2200133Ia 4500
008 221102s9999 xx 000 0 und d
082 _a384.648 BLA
100 _aBlack, Uyless D
245 0 _aData communications and distributed networks
250 _a3rd ed
260 _bPHI
_aDelhi
_c1997
300 _a425p p.
942 _cBK
999 _c875
_d875