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

 - 4th ed.  
 - Harlow  Addison -Wesley  1999 
 - xvi,907p.  
<br/><br/> Includes bibliographical references and Index  
<br/><br/><label>Dewey Class. No.: </label>001.64404 HAL