Singh, Ashok Kumar. <br/><br/>
Science and technology : for civil services examinations /  
Director by Ashok Kumar Singh. 
 - /   . 
 - New Delhi :   Tata McGraw Hill Education ,   2011. 
 - viii, 646p. :   ill.,fig ;   22cm  cm .  
 - Tata McGraw-hills series,   NULL  NULL; .
 - Tata McGraw-hills series,   NULL  NULL; .
<br/><br/>NULL 
<br/><br/><label>ISBN: </label> RS325.00 (pbk) 
<br/><br/><label>Subjects--Index Terms: </label>CIVIL SERVICES EXAMINATION-GUIDE BOOK 
<br/><br/><label>Dewey Class. No.: </label>351.076  / SIN/S