Tyagi, Anil  . <br/><br/>
Trueman`s UGC NET/SET Environmental Science /  
by Anil Tyagi and Virendra Singh. 
 - New Delhi :   Danika Publishing Company ,   2013 
 - 528p ;  
<br/><br/><label>ISBN: </label>81-89301-44-6 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental Science
<br/><br/><label>Dewey Class. No.: </label>G:55  / Q3