Halsall, Fred <br/><br/>
Data communications, computer networks and open systems 

 - 4th ed. 
 - New Delhi  Pearson Education  1996 
 - 915 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Data comunications Networks,computer Open systems
<br/><br/><label>Dewey Class. No.: </label>001.60321  HAL;3