Pratibha Singh <br/><br/>
Textbook of environment & ecology 

 -  Acme Learning  New Delhi  2009 
 - xxix, 348p.   
<br/><br/> Includes bibliographical references, glossary and index. 
<br/><br/><label>ISBN: </label>9788190710497 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology<br/>Energy<br/>Environment and ecology<br/>Environmental pollution<br/>Environmental protection<br/>Natural resources<br/>NGOs  Environmental protection