kotpal, R. L., <br/><br/>
Concept pf Ecology 

 - 1st. 
 - Jalandhar:  Vishal Publications. 
 - 264p. 
<br/><br/><label>Subjects--Personal Names: </label><br/>Zoology, Ecology. 
<br/><br/><label>Dewey Class. No.: </label>574.5