Scheme of classification for the United States Department of Agricultural Library 

 - 6th 
 -  1942 
<br/><br/><label>Standard No.: </label>4,665 
<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, H0 (2D)