Dept. of Science <br/><br/>
තරංග   

 - Deparment  of Science Publisher   Battramulla   2019 
 - 30p  1 
 - 2023-11-10 
<br/><br/><label>Nat. Bib. No.: </label>0007364 
<br/><br/><label>Nat. Bib. Agency Control No.: </label>SCI 
<br/><br/><label>Universal Decimal Class. No.: </label>530