Biswas,Pratul , <br/><br/>
Environmental studies : open elective paper  
Pratul biswas Kalyan biswas  
 - 2nd ed. 
 - New Delhi :  Vision book house ,  2019. 
 - 270p, ;  24 cm. 
<br/><br/><label>ISBN: </label>9789352996667 
<br/><br/><label>Subjects--Topical Terms: </label>
<br/><br/><label>Subjects--Index Terms: </label>Eco systems  Human communities and the environment  Filed work 
<br/><br/><label>Dewey Class. No.: </label> / BIS