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Item Water quality in the dry zone of Sri Lanka - some interesting health aspects(National Science Foundation:Colombo, 2005) Dissanayake, C.B.Item Water quality in the dry zone of Sri Lanka - some interesting health aspects(National Science Foundation. Colombo, 2005) Dissanayake, C.B.Item A geochemistry classification of groundwater of Sri Lanka(National Science Council:Colombo, 1985) Dissanayake, C.B.; Weerasooriya, S.V.R.Item Geochemistry of soils in the Sabaragamuva Province of Sri Lanka - effect of climate(1993) Navaratna, U.R.B.; Dissanayake, C.B.