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Item Rapid extraction of copper (II) with 1-phenyl-3-methyl-4-nitrobenzoyl-5-pyrazolone in different organic diluents(National Science Council:Colombo, 1992) Ogwegbu, M.O.C.; Oforka, N.C.; Spiff, A.I.Item A route to the synthesis of aluminium sulphate from local raw materials(National Science Council:Colombo, 1983) Jayatileke, J.M.S.; Ismail, M.G.M.U.Item Semiconductor to metal transition in ferric molybdate(National Science Council:Colombo, 1983) Tennakone, K.; Dharmaratna, W.G.D.