Gopal, Brij <br/><br/>
Elements of ecology / 
Brij Gopal, N. Bhardwaj 
 - Newdethi :  Vinkas,  c1981. 
 - 200p. :  ill. ;  22cm. 
<br/><br/>includes index 
<br/><br/><label>ISBN: </label>0706915607 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology
<br/><br/><label>Dewey Class. No.: </label>581.5  / GOP