Joseph, V. <br/><br/>
උසස් පෙළ ගතිකය 

 - Colombo:  Educational publications department,  1994. 
 - 418p.;  21cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>519.703  / JOS