Singh, H.R. <br/><br/>
Ecology and environmental science / 
by H.R. Singh and Neeraj Kumar 
 - 1st ed. 
 - New Delhi  Vishal Publishing Co, 
 - 344p. 
<br/><br/><label>ISBN: </label>9789387015227 
<br/><br/><label>Dewey Class. No.: </label>G:55:(A)  / [R4]