Parker, P. <br/><br/>
උසස් පෙළ භෞතිකය  

 - Educational Department   Sri Lanka  1993 
 - 206p  1 
 - 2023-11-10 
<br/><br/><label>Nat. Bib. No.: </label>0004862 
<br/><br/><label>Nat. Bib. Agency Control No.: </label>PAR 
<br/><br/><label>Universal Decimal Class. No.: </label>530