Lesson 18: Treating a water sample using alum and sunlight
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Research Services Centre, Faculty of Science, University of Kelaniya
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Skandaraja, S.S. 2015. Lesson 18: Treating a water sample using alum and sunlight, In: Practical Manual for GCE A/L Biosystem Technology Teachers. Ministry of Education and University of Kelaniya, Sri Lanka. 123-125 pp.