Mathupala, M, C,  <br/><br/>
5S එස් පහ 

 - Colombo:  Sadeepa,  2003. 
 - 112p.;  21 cm 
<br/><br/><label>ISBN: </label>978-955-661-689-7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Management
<br/><br/><label>Dewey Class. No.: </label>658  / MAT