Kotpal, R.L. N.P. Bali <br/><br/>
Concepts of Ecology 
/ by R.L. Kotpal 
 - 3rd ed. 
 - Delhi :  vishal Publications,  1981 
 - III, 257 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biology
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>Ecology
<br/><br/><label>Dewey Class. No.: </label>577  / KOT-C3