Sharma,R.S. <br/><br/>
Encyclopaedia of Education  Environmental education Vol 7. 
S Sharma 
 - New delhi   Commonwealth publishers; 2008 
<br/><br/><label>ISBN: </label>978-81-7169-719-9 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education-Encyclopaedias
<br/><br/><label>LC Class. No.: </label>LB 15 .E531 2008 V.7