1975 grading of public water supplies in New Zealand : a report /
Nineteen seventy five grading of public water supplies in New Zealand
prepared for the Board of Health ; by the Department of Health, 1975.
- 63 pages ; 22 cm.
- Report series ; no. 25 .
- Report series (New Zealand. Board of Health) ; no. 25. .
Water--Analysis. Municipal water supply--Evaluation--New Zealand Water quality management--Evaluation--New Zealand