Pieris,R <br/><br/>
Sinhala samaja sanvidanaya  :  mahanuwara yugaya 

 - 2nd 
 - Boralesgamuwa  C/S (Private) Visidunu Publishers  2001 
 - 385 p ., 
<br/><br/> Translation of Sinhala Social Organization by K.A.D.Perera 
<br/><br/><label>ISBN: </label>9559170376 
<br/><br/><label>Dewey Class. No.: </label>954  / PIE