Pagnis Ravikant.  <br/><br/>
Environmental studies 

 - New delhi :   Tech-Max   2016. 
 - 237.  
<br/><br/><label>ISBN: </label>978-81-8492-461-9  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Engineering,
<br/><br/><label>Dewey Class. No.: </label>628  / PAG