Used by the division of technical information in cataloging reports 

 - 7th ed. 
 - United States:   Division of Technical Information Extension,   1969 
 - 169p. 
 - Report number series .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Report
<br/><br/><label>Universal Decimal Class. No.: </label>R 047:621.039(083)  / K9