Classification Class Q   Science 

 - 6th 
 - Washington  Library of congress       1973 
<br/><br/><label>Standard No.: </label>6,213 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>LIBRARY SCIENCE
<br/><br/><label>Dewey Class. No.: </label>2:51 (A), L3 (2)