00297nam a2200109Ia 4500080001900000100002100019245004900040250001100089260005200100300001600152583001900168  a19.01.07 B6275  aBlack, Uyless D.  aData communications and distributed networks  a2. ed.  bPrentice Hall InternationalaNew JerseyUSc1987  axii, 468 p.  c3/7/00kM2LMGR