1. A.P.H.A., Standard methods of analysis of water and waste water. 1976, 14th edition.
2. Bhatnagar, N.C., Hydrogeological conditions in the state of Haryana with possibilities of groundwater development. 1977, C.G.W.B. mimeographed report.
3. Brown et al, Methods of collection & analysis of water samples for dissolved minerals & gasses. USGS 1972, Book V, Chapter A1.
4. Handa B.K., Chemical Composition of Premonsoon showers over Calcutta in 1968, Science and Culture.
5. Chemical Composition of monsoon rains over Calcutta;Handa;Tellus,1969