Rathnathilaka, R.M.M.B.; Dissanayake, D.K.S.M.A.; de Silva, A.K.M.; Kamalawarna, R.S.S.(Social Statistics Students’ Association, Department of Economics, University of Kelaniya, 2015)
Fernando, K.C.L.; Abesinghe, M.S.; Ranasilige, H.; Madushani, K.; Chathurika, C.(Social Statistics Students’ Association, Department of Economics, University of Kelaniya, 2015)
Herath, H.M.H.C.; Sampathge, R.T.A.; Fernando, N.H.M.; Dewuduni, J.M.D.M.H.; Damayanthi, M.K.N.(Social Statistics Students’ Association, Department of Economics, University of Kelaniya, 2015)