Ramasamy, R <br/><br/>
Journal of the national science council of Sri Lanka  January 1994 

 - Colombo  NARESA 
 - [8],86 p.  Illustration 
 - Journal of the national science council of Sri Lanka, January 1994  Vol. 22 (Supplement A) .
<br/><br/><label>Dewey Class. No.: </label>B0416  / LDC