1.Gilbert M. Masters. 1988. “Introduction to Environmental Engineering and Science”, Prentice-Hall of India Private Limited, 270.

2.Voldner, E.C. and Sirosis, A. 1986. “Monthly mean spatial variation of dry deposition velocities”, Water, Air and Soil Pollution, 30: 179.

3.Hicks, B.B., Hosker, R.P. Jr. and Matt, D.R. 1987. “A preliminary multiple resistance routine for deriving dry deposition velocities from measured quantities”, Water, Air and Soil Pollution, 36: 311.

4.Hicks, B.B., Hosker, R.P. Jr., Meyers, T.P. and Womack, J.D. 1991. “Dry deposition inferential measurement techniques – I. Design and tests of a prototype meteorological and chemical system for determining dry deposition”, Atmospheric Environment, 25: 2345.

5.Nilsson, J. and Grennfelt, P. 2008. “Critical Loads for sulphur and nitrogen”, A Report from a workshop at Skokloster, Sweden, Nordic Council of Ministers, Miljorapport 2008:15, Copenhagen.

6.Critical Load Advisory Group. November 1996. “Introduction, Derivation and Mapping Sulphur Dioxide polluted cloud and rain nitrogen oxide and ammonia, ozone: Major constraints and Future Issues”, Summary Report ISBN: 1 870393 3.

7.Aherne, J. et al. 1999. “Selecting Climatic Criteria for Critical Loads of Acidity in maritime regions”, International Conference and Workshop on Critical Loads, Copenhagen, 2.

8.Foell, W., Amann, M., Carmichael, G., Chadwick, M., Hettelingh, J.P., Hordijk, L. and Dianwu, Z. 1995. “Acid Rain and Emission reductions in Asia”, RAINS-Asia, Report on the World Bank Sponsored Project, VI - 53.

9.Mahadevan, T.M., Meenakshi, V. and Sathe, A.P. 1984. “Some observations on the chemical composition of precipitation in an industrial area and its use in air quality assessment”, Mausam, 35: 87.

10.Olsson, M. and Melkerud, P.A. 1990. “Determination of weathering rates based on geochemical properties of the soil”, In: Pulkinene E., editor, Proceedings of the Conference on Environmental Geochemistry in Northern Europe, Geological Survey of Finland, vol., Symposium Series nr 34:45-61.

11.India Metrological Department (IMD), Climatological tables of observatories in India (1931- 1960), New Delhi, 1993.

12.Hettelingh, J.P., Downing, R.J. and de Smet PAM. 2011. “Mapping Critical Loads for Europe”, Coordination Center for Effects, Bilthoven, The Netherlands, Technical report No. 1, RIVM report No. 259101001.

13.Jackson, G.D. 2000. “Effect of nitrogen and sulphur on Canola yield and nutrient uptake”, Agronomy Journal, 92: 644-649.

14.Marschner, H. 1992. “Mineral Nutrition in Higher Plants”, pp. 543.