Kumar, Ajay  . <br/><br/>
Encyclopaedia of science and technology /  
by Ajay Kumar. 
 - Delhi :   IVY Publishing House ,   2005 
 - 3 vols :  
<br/><br/><label>ISBN: </label>81-7890-123-4 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Natural Science- Encyclopaedia
<br/><br/><label>Dewey Class. No.: </label>Ak  / P5.3