Kotpal,R.L. <br/><br/>
Concepts of ecology   environmental and field biology 

 - New Delhi  Vishal Publications  1989 
 - iv,264,vi  Hb 
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>
<br/><br/><label>Dewey Class. No.: </label>574.5