Sehgal, R L <br/><br/>
Introduction to Universal Decimal classification 
by Sehgal, R L 
 - New Delhi  Ess Ess publication  1994 
<br/><br/><label>ISBN: </label>8170001668 
<br/><br/><label>Dewey Class. No.: </label>025.432 SHE/INT