Herath, H.M.B.S.Kotagama, H.B.2014-11-122014-11-121996Tropical Agricultural Research, 8:p.252-261https://dl.nsf.gov.lk/handle/1/12063Natural resourcesEppawala rock phosphate depositEconomic viabilityNon renewable resource managementSustainable developmentEconomic management of Eppawala phosphate deposit , Sri Lanka:an empirical applicationA