Atreya, Brijesh Dutta <br/><br/>
Paryavaran adhyayan: kaksha IV ke liye pathyapustak; bhag 2/ 

 - New Delhi:  NCERT,  1981 
 - 80 
<br/><br/><label>Source: </label> 5801-03-2004 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental Studies