KUMAR, Krishan. <br/><br/>
Theory of Classification 

 - 4th ed 
 - New Delhi  Vikas Pub House Pvt Ltd  2008 
 - xii,560p. 
<br/><br/><label>ISBN: </label>0-7069-8638-5 
<br/><br/><label>Dewey Class. No.: </label>25.42