A study of the effectiveness of cargo selection system for examination in the Sri Lanka custom 
Loganathan, T. 
 -  2009. 
 - x,68p.: 
<br/><br/> Wijekoon, W.M.M.G.D., & Siriranjan, N. 
<br/><br/><label>Gov. Doc. Class. No.: </label>MPM/T/90