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2. Standard methods for the analysis of water and wastewater (1962) published by American Public Health Association, American Water Works Association and water Pollution Control, Federation, p. 318.
3. S. Kumar, H. Shukla and L. Viswanathan (1985), Int. Sugar Journal (in press).
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5. Standard methods for analysis of water and wastewater (1962), published by Americal Public Health Association, Americal Water Works Association and Water Pollution Control, Federation, p. 437.