On-line services reference manual 

 - Virginia:   National Technical Information Service,   1976 
 - 379p. 
<br/><br/><label>ISBN: </label>301-496-6193 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Report
<br/><br/><label>Universal Decimal Class. No.: </label>D 681.3.022(02)  / L6