Dharmasiri,L.M <br/><br/>
Samajeeya vidya paryeshana 

 - 2nd 
 - Kelaniya  Lal Melwin Tharamasiri  2007 
 - xiv, 268 p ., 
<br/><br/><label>ISBN: </label>9559872206 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social Science Research
<br/><br/><label>Dewey Class. No.: </label>301.072  / DHA