Roy, Sovan <br/><br/>
Environmental science   a comprehensive treatise on ecology and environment  [Book] 
Sovan Roy. 
 -  Publishing Syndicate Kolkata 
<br/><br/> All. 
<br/><br/><label>ISBN: </label>8187704004 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology
<br/><br/><label>Dewey Class. No.: </label>574.5