William Stallings & Richard Van Slyke <br/><br/>
Business Data Communications 

 - 3rd ed 
 -   Prentice-Hall, Inc.  ©1998 
<br/><br/><label>ISBN: </label>9780135945810  69.9 
<br/><br/><label>Dewey Class. No.: </label>004.6/STA