Gopal, Brij <br/><br/>
Elements of ecology / 
Brij Gopal, N. Bhardwaj. 
 - Kolkata :  Vikas publishing,  1979 
 - vi, 200p. :  ill. ;  22x14cm. 
<br/><br/> Includes bibliography and index 
<br/><br/><label>ISBN: </label>0-7069-1560-7 :  Rs.16 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ECOLOGY
<br/><br/><label>Dewey Class. No.: </label>574.5  / GOP-ELE