Gunasekara, Goolba <br/><br/>
The 'principal' factor 

 - Nugegoda  Sarasavi  2021. 
 - 205 p. 
<br/><br/><label>ISBN: </label>9789553122360 
<br/><br/><label>Subjects--Topical Terms: </label><br/>EDUCATION<br/>EDUCATION METHODS
<br/><br/><label>Dewey Class. No.: </label>B3014  / LDC