Jayathilake, K.M.D.S. <br/><br/>
උසස් පෙළ දෛශික 
= Usas Pela Daishika 


 - Colombo:  pubudu publisher,  1985. 
 - 150p.;  21cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>515.6  / JAY