Journal of the National Science Foundation of Sri Lanka, Vol.31, no.1-4 (2003) 

 - [S.l]:  National Science Foundation of Sri Lanka,  2003. 
 - 01.03.2003-31.12.2003 
<br/><br/><label>ISSN: </label>1391-4588 
<br/><br/><label>Dewey Class. No.: </label>505  / JOU