A study of the existing enumeration system of the Department of Elections 
Weerasena, E.A. 
 -  2006. 
 - x,49p.: 
<br/><br/> Amarawardena, G.K.D., & Wijekoon, W.M.M.G.D. 
<br/><br/><label>Gov. Doc. Class. No.: </label>MPM/T/31