Dilrukshi, L.H.C.; Kumara, S.M.A.I.P.; Shashikani, G.K.H.; Madushani, M.R.S.; Damayanthi, M.K.(Social Statistics Students’ Association, Department of Economics, University of Kelaniya, 2015)
Madushani, H.D.P.; Nayomi, W.V.P.N.; Dasanayake, D.H.M.; Perera, L.G.D.(Social Statistics Students’ Association, Department of Economics, University of Kelaniya, 2015)
Kahatapitiya, K.P.K.D.; Kodituwakku, D.S.; Jayawardhana, M.N.; Muhandiramge, K.M.R.R.; Gunawardhana, K.(Social Statistics Students’ Association, Department of Economics, University of Kelaniya, 2015)