Perera,G <br/><br/>
Paryeshana kramaweda 

 - Colombo  Sahasra Publishers  2008 
 - viii, 216 p ., 
<br/><br/><label>ISBN: </label>9789551767112 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Researach Methodology
<br/><br/><label>Dewey Class. No.: </label>300  / PER