ITU/CCITT <br/><br/>
RED BOOK,VOL.VIII,FASCICLE VIII.4: DATA COMMUNICATION NETWORKS TRANSMISSION,SIGNALLING ...(CCITT STD) 

 - 1 
 - GENEVA  ITU  1985 
 -  357 
<br/><br/><label>ISBN: </label>NCST 
<br/><br/><label>Dewey Class. No.: </label>335