CCITT <br/><br/>
BLUE BOOK,VOLUME VIII,FASCICLE VIII.1: DATA COMMUNICATION OVER TELEPHONE NETWORK SERIES V RECOMMENDATIONS 

 - GENEVA  ITU  1989 
 -  520 
<br/><br/> SC-022 
<br/><br/><label>ISBN: </label>ERNET 
<br/><br/><label>Dewey Class. No.: </label>335