Encyclopedia of science and technology  

 - New Delhi:   Crest Publishing House,   1994 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science 
<br/><br/><label>Subjects--Index Terms: </label>Technology  
<br/><br/><label>Universal Decimal Class. No.: </label>R 5/6(031)  / N4.5