Data processing documentation standards 
NCC 
 - Manchester  National Computing Centre  1977 
 - v. ill. 33cm. 
<br/><br/><label>ISBN: </label>0850121760 
<br/><br/><label>LCCN: </label>78-315282 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronic data processing documentation--Standards