Perera, S <br/><br/>
Pathitha :  samaja vidya sameeksha 

 - Colombo  Social Scientist Association  2003 
 - 150 p., 
<br/><br/><label>ISBN: </label>13919148 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social Survey
<br/><br/><label>Dewey Class. No.: </label>303  / PAT