Gopal, Brij . <br/><br/>
Elements of Ecology /  Textual Documents 
Brij Gopal and N. Bhardwaj. 
 - 1st ed. / 
 - New Delhi :  Vikas Publishing House Pvt. Ltd. ,  1979. 
 - vi,200p. :  ill ;  22cm . 
<br/><br/>Index 
<br/><br/><label>Subjects--Index Terms: </label>Zoology Ecology G-Zoology 
<br/><br/><label>Dewey Class. No.: </label>591.5  / Bh 469 El