Chawla, Shashi. <br/><br/>
A Text book of environmental studies / 
by Shashi Chawla. 
 - New Delhi :  Tata McGraw Hill Education,  2012. 
 - 1 vol (various pagings.) ; 
<br/><br/><label>ISBN: </label>1259006387 : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Human ecology--Study and teaching.