1. Indian Standard Institution, Indian Standard for Trace Metal in Drinking Water, 1983, pp. 15–10500.
2. T.R. Comp, Water and its Impurities, Reinhold, New York, 1964.
3. A.G. Mukherjee, Environmental Pollution and Health Hazards Causes and Control, Galgotia Publication, New Delhi, 1986.
4. U. Forstner, C.T.W. Wittman, Metal Pollution in the Aquatic Environment, Springer, New York, 1981.
5. Study of the influence of fulvic substances on the adsorption of Cu(II) ions at the kaolinite surface;Dalang;Environ. Sci. Technol.,1984