Halsall, Fred. <br/><br/>
Data communications, computer networks and OSI. 
by Fred Halsall. 
 - 2nd. 
 - Workingham  Addison-wesley  1988 
 - XV, 549p. 
 - Electronic systems engineering series.   .
<br/><br/><label>ISBN: </label>0201182440 
<br/><br/><label>Dewey Class. No.: </label>004.68  / N882