Study on the Debt recovery system in the Sri Lanka railway department 
Kumara, WS.R.J. 
 -  2008. 
 - ix,82p.: 
<br/><br/> Medagama, S., & Yalegama, M.M.S.S.B. 
<br/><br/><label>Gov. Doc. Class. No.: </label>MPM/T/73