References

References
Standard methods for examination of water and waste water. American Public Health Association, Inc., New York, 1960.
Standard methods for examination of water and waste water
1960
Theroux, R. Eldridge, E. F. and Mallman, W. L., Chemical and bacterial analysis of water and sewage, McGraw-Hill Book Co., New York, 1943.
Theroux
Chemical and bacterial analysis of water and sewage
1943
Welch, Paul S., Limnological methods, McGraw- Hill Book Co., New York, 1948.
Welch
Limnological methods
1948
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