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2. Chemical characterisation of public water supply;Barnett;J. AWWA,1969
3. Phosphate removal by serpentine mineral;Bulusu;Indian J. Environ. Health,1978
4. Removal of ortho and condensed phosphate by clay and Aluminium phosphate;Bulusu;Indian J. Environ. Health,1979
5. Clay adsorption treatment of nonionic surfactants in wastewater;Carberry;J. Water Pollul. Contr. Feb.,1977