D W davies , D L A Barber <br/><br/>
Computer networks 

 - 
 -  John Wiley and Sons  1979 
 - 487 
<br/><br/>  
<br/><br/><label>ISBN: </label>0-471-99750-1 
<br/><br/><label>Dewey Class. No.: </label>004.738.5