Study of the effectiveness of dengue epidemic control programs in the Colombo City 
Dalpatadu, C.B.R. 
 -  2009. 
 - ix,64p.: 
<br/><br/> Wijekoon, W.M.M.G.D., & Jayasundara, N.J. 
<br/><br/><label>Gov. Doc. Class. No.: </label>MPM/T/66