Bhattacharya, Shukla <br/><br/>
Exploring environment book two: a text book for class IV/ 

 - New Delhi:  NCERT,  1988 
 - vi, 111 
 - Environmental Studies-Science .
<br/><br/><label>Source: </label> 15405-09-2007 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environment-Text Book