00326nam a2200121Ia 450000500170000008000190001710000210003624500490005725000110010626000520011730000160016958300190018520260716043022.0  a19.01.07 B6275  aBlack, Uyless D.  aData communications and distributed networks  a2. ed.  bPrentice Hall InternationalaNew JerseyUSc1987  axii, 468 p.  c3/7/00kM2LMGR