Agrahari, Ravi P <br/><br/>
Science and technology for civil services examinations 

 - Chennai  Mc Graw Hill Education (India) Pvt. Ltd.  2017 
<br/><br/><label>ISBN: </label>978-93-5260-570-5 
<br/><br/><label>Subjects--Index Terms: </label>Civil Service  IAS