Library of Congress subject headings / 
Subject Cataloguing Division, Processing Services, Library of Congress. 
 - 9th ed. 
 - Washington, D.C. :  Library of Congress,  1980. 
 - 2 v. ;  32 cm. 
<br/><br/> Incorporates material through 1978.  Kept up to date by cumulative supplements issued quarterly. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Subject headings.