Singh, Ashok Kumar <br/><br/>
Science and technology for Civil services examinations / 

 - New Delhi :  Tata McGraw Hill Publishing Co Ltd ,  2008. 
 - viii+646 
 - Tata McGraw-Hills winning edge series .
<br/><br/><label>ISBN: </label>9780070655485 
<br/><br/><label>Subjects--Index Terms: </label>Competitive Exam Guide Science And Technology