References
- Gales , M. E. , Julian , E. C. and Kroner , R. C. 1966 . Journal of American Water Works Association , 58 : 1363 – 1368 .
- Hanvood , J. E. , van Steenderen , R. A. and Kühn , A. L. 1969 . Water Research , 3 : 425 – 432 .
- Sanning , D. E. 1967 . Water and sewage Works , 114 : 131 – 133 .
- A. W. W. A., A. P. H. A. and W. P. C. F. 1971 . Standard Methods for the Examination of Water and Waste Water, , 13th Edition , 518 – 534 . Washington : American Public Health Association .
- Dubois , K. P. and Geiling , E. M. K. 1959 . Textbook of Toxicology , 198 – 199 . New York : Oxford University Press . (pp.
- Harwood , J. E. , van Steenderen , R. A. and Kühn , A. L. 1969 . Water Research , 3 : 417 – 423 .
- Murphy , J. and Riley , J. P. 1962 . Anal. Chim. Acta. , 27 : 31
- Stephens , K. 1963 . Limnology and Oceanography , 8 : 361
- Strickland , J. D. H. and Parsons , T. R. 1965 . A Manual for Sea Water Analysis, , 2nd Edition , 43 – 65 . Ottawa : Fisheries Research Board of Canada . (Bulletin No. 125)
- Johnson , D. L. 1971 . Environment Science and Technology , 5 : 411
- Golterman , H. L. and Clymo , R. S. , eds. 1970 . Methods for Chemical Analysis of Fresh Waters , 78 Oxford : Blackwell Scientific Publications . (IBP Handbook No. 8)
- Ferguson , J. F. and Gavis , J. 1972 . Water Research 6 pp. 1259
- Brown , G. H. and Sallee , E. M. 1963 . Quantitative Chemistry , 103 Englewood Cliffs, N. Jersey : Prentice Hall Inc. . (pp.
- Fitzgerald , G. P. and Faust , S. L. 1967 . Limnology and Oceanography , 12 : 332
- 1969 . The Bacteriological Examination of Water Supplies, , 4th ed. , 7 London : Her Majesty's Stationery Office . Reports on Public Health and Medical Subjects No. 71(,pp., 34, 45