Singh Ashok Kumar <br/><br/>
Science and Technology: for civil service examinations 

 - Chennai  McGraw Hill Education India Pvt. Ltd.  2017 
 - 646 
<br/><br/><label>ISBN: </label>9780070655485 
<br/><br/><label>Subjects--Topical Terms: </label><br/>science and technology
<br/><br/><label>Dewey Class. No.: </label>500 SIN