Roy, Sovan. <br/><br/>
Environmental science : a comprehensive treatise on ecology and environment /  
Sovan Roy. 
 - /   . 
 - Kolkata :   Publishing syndicate ,   2003. 
 - xvi,624p. :   ills.,picts.,tables ;   24cm .  
<br/><br/>Includes bibliographical references ,appendix and index 
<br/><br/><label>ISBN: </label> RS300.00 (Pb) 
<br/><br/><label>Subjects--Index Terms: </label>ECOLOGY 
<br/><br/><label>Dewey Class. No.: </label>577.27  / ROY/E