Sehgal, R L <br/><br/>
Introduction to dewey decimal classification 
byR. L .Sehgal 
 - New Delhi  Ess Ess publication  1994 
<br/><br/><label>ISBN: </label>817000165X 
<br/><br/><label>Dewey Class. No.: </label>025.431 SEH/INT