Bir, Ritu <br/><br/>
Environmental studies 
Bir, Ritu 
 - 
 - Vayu Education of India, Delhi  2009 
 - 180 p 
 - .
<br/><br/>  
<br/><br/><label>ISBN: </label> 120 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental Management
<br/><br/><label>Dewey Class. No.: </label>333.7E  BIR