Paribesh sikshar keitiman path 
by  
 - 1st. 
 - Guahati:  Early birds,  2002. 
 - 68p:  23cm. 
<br/><br/><label>Subjects--Index Terms: </label>Environmental science Paribesh sikshar keitiman path 
<br/><br/><label>Dewey Class. No.: </label>363.7