Edirisinghe, A.G.H.J.Perera, K.Warnakulasooriya, A.G.S.K.2016-07-042016-07-042011Proceedings of the Symposium on "Disasters: Reduction, Mitigation and Management", 25th and 26th February 2011, Institute of Fundamental Studies, Kandy:p.14https://dl-ifs.nsf.gov.lk/handle/1/1519Article