Gopal, Brij  <br/><br/>
Elements of ecology /  
Brij Gopal and N. Bhardwaj. 
 - New Delhi :   Vikash publishing house,  c 1979. 
 - vi, 220 p. :  ill. ;  22 cm. 
<br/><br/> Includes index. 
<br/><br/>Bibliography : p. 177-196 
<br/><br/>346  346 
<br/><br/><label>ISBN: </label>0 7069 0754 X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology.
<br/><br/><label>Dewey Class. No.: </label>581.5 / B768e