A Study on the effectiveness of external gateway operation deregulation on Telecommunication Industry in Sri Lanka. 
Jayawardena,P.D.A.S. 
 -  February 2014 
 - x,86p.: 
<br/><br/> Sudasinghe,S.R.S.N. 
<br/><br/><label>Gov. Doc. Class. No.: </label>MPM/T/259