Wikramasigha <br/><br/>
අවකලන සමීකරණ 
= Awakalana Samikarana 


 -  1963 
 - 119p.;  20cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Natural sciences and mathematics
<br/><br/><label>Dewey Class. No.: </label>515.4  / WIC