Kotpal, R. L. <br/><br/>
Concept of ecology  Environmental and field biology 

 - New Delhi  Vishal Publications  1988 
 - (4),vi,264,vi  Hb  20.5 cm 
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>
<br/><br/><label>Dewey Class. No.: </label>574.5