A study on efficiency of the marketing policy of Lanka Mineral Sands Limited 
Costa, W.D.A.K.P. 
 -  2014. 
 - ix,45p.: 
<br/><br/> Wakkumubura, M.R., & Lokugamage, A. 
<br/><br/><label>Gov. Doc. Class. No.: </label>MPM/T/303