TNPSC : general studies (general science) 
Sakthi Publishing House 
 - Chennai  Sakthi Publishing House  2016 
 - various pages, ; 28 cm 
<br/><br/><label>ISBN: </label>9789386195180 
<br/><br/><label>Subjects--Topical Terms: </label><br/>General Knowledge<br/>General Science
<br/><br/><label>Dewey Class. No.: </label>153.94 SAK