Kumar, Krishna <br/><br/>
Theory of classification  [Texte imprimé] / 
Krishan Kumar 
 - 3rd ed. 
 - New Delhi:  Vikas Publishing House,  1983 
<br/><br/><label>ISBN: </label>0-7069-2313-8 
<br/><br/><label>Dewey Class. No.: </label>025.42