Gupta's R. <br/><br/>
IFS Main Examination : Chemistry Paper 1 and 2 

 - New Delhi  Ramesh Publishing House  2019 
 - 456p 
<br/><br/><br/>ENGLISH 
<br/><br/><label>ISBN: </label>81-7812-936-5 
<br/><br/><label>Dewey Class. No.: </label>153.9454  / GUP