Singh, Ashok Kumar <br/><br/>
Science & technology ;   for civil services examinations / 

 - New Delhi :   Tata McGraw Hil Education Private Limited  2013. 
 - 647 p.  ill ;   23 cm. 
<br/><br/><label>ISBN: </label>9780070655485 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science--Science--Study guides--Technology
<br/><br/><label>Dewey Class. No.: </label>351.076 ASH