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Water SA
On-line version ISSN 1816-7950
Print version ISSN 0378-4738

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DZWAIRO, Bloodless  and  OTIENO, Fredrick AO. Class frequency distribution for a surface raw water quality index in the Vaal Basin. Water SA [online]. 2014, vol.40, n.2, pp.337-344. ISSN 1816-7950.