Wickramasinghe, Rohana H <br/><br/>
Contemporary environmental challenges  

 - SLRC  ITES  1988 
 - 125 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biology<br/>Ecology
<br/><br/><label>Dewey Class. No.: </label>574.5  / W31