Singh, Ashok Kumar <br/><br/>
Science and technology: for Civil services exminations 
Ashok Kumar Singh 
 - New Delhi  Tata McGraw-Hill Education  2009 
 - viii, 646 
 - Tata McGraw-Hill winning edge series .
<br/><br/><label>ISBN: </label>0070655480 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Technology-Competitions<br/>Technology-Scientific applications
<br/><br/><label>Dewey Class. No.: </label>601.5076  / SIN P9