Library of congress subject heading 

 - 12th 
 - Washington  Library of congress      1989 
<br/><br/><label>Standard No.: </label>36052 
<br/><br/><label>Source: </label> Reference Collections 
<br/><br/><label>Subjects--Topical Terms: </label><br/>LIBRARY SCIENCE
<br/><br/><label>Dewey Class. No.: </label>2 :55, L5;M9.1-.3(RR)