Sehgal R L <br/><br/>
An introduction to universal decimal classification. 

 - New Delhi  Ess Ess Publishing      1994 
 - 265p.  cm. 
<br/><br/><label>Standard No.: </label>120425 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>2:51N05, N4