Halsall, Fred <br/><br/>
Data communications, computer networks and open systems 3rd ed 

 - 3rd ed 
 - Addison-Wesley publishing company, England  1992 
 - xi,772 
<br/><br/><label>ISBN: </label>0-201-56506-4 
<br/><br/><label>Dewey Class. No.: </label>001.64404 Hal