Zyg.Ulc. <br/><br/>
McGrawhill Enclopedia of Science and technology. 

 - 9th 
 - New Delhi  Mcgraw Hill  2002 
 - 768 
<br/><br/><label>ISBN: </label>0-07-913665-6 
<br/><br/><label>Subjects--Topical Terms: </label><br/>General Books