Tyagi. <br/><br/>
Textbook of Ecology 

 - 1st /   2013. 
 - N. Delhi:  Astha publishers & dristributors.,  2013. 
 - 264. 
<br/><br/><label>ISBN: </label>9789382126102 
<br/><br/><label>Subjects--Personal Names: </label><br/>Ecology, Textbook of ecology. 
<br/><br/><label>Dewey Class. No.: </label>581.5