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2. Holden, W. S., ed. 1970.“Water Treatment and Examination'”, viii + 841London: Churchill. for the Society for Water Treatment and Examination,
3. Faecal coliform bacteria: Is a national standard applicable to the Wellington area?
4. World Health Organisation. 1971.“International Standards for Drinking Water”., 3rd edition, 70Geneva: WHO.
5. Anon. 1963.“The New Zealand Waters Pollution Regulations 1963”, 8Wellington: Government Printer.