Black, Uyless D <br/><br/>
Data communications and distributed networks 

 - 3rd ed. 
 - New Delhi  Prentice- Hall of India  2002 
 - 426 p. 
<br/><br/><label>ISBN: </label> RS125 
<br/><br/><label>Dewey Class. No.: </label>005.71 B561D