Singh, Ashok Kumar. <br/><br/>
Science & Technology 

 - New Delhi   Tata Mcgraw Hill Education   2008  
 - viii, 646 p.  illus.;  
 - Winning we edge. .
<br/><br/><label>ISBN: </label>9780070655485 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Civil Services<br/>Technology
<br/><br/><label>Dewey Class. No.: </label>500.76  / S64S