Madushani, H.D.P.; Nayomi, H.V.P.M.; Dasanayake, D.M.H.; Perera, L.G.D.(Social Statistics Students’ Association, Department of Economics, University of Kelaniya, 2015)
Gunasekara, K.D.H.U.; Sandamali, M.A.D.N.; Fernando, K.D.A.K.; Padmasika, P.A.T.(Social Statistics Students’ Association, Department of Economics, University of Kelaniya, 2015)
Hettiarachchi, H.A.S.S.; Dissanayake, A.A.P.; Niroshan, D.M.M.; Damayanthi, M.K.N.(Social Statistics Students’ Association, Department of Economics, University of Kelaniya, 2015)