A study on the effectiveness of communication systems for improving revenue compliance of the Department of Inland Revenue 
Dahanayaka, K. 
 -  2006. 
 - iii,58p.: 
<br/><br/> Jayasundara, W.A., & Wijekoon, W.M.M.G.D. 
<br/><br/><label>Gov. Doc. Class. No.: </label>MPM/T/005