1. Campbell, G.W., Cocksedge, J.L., Coster, S.M., Dennis, A.L., Devenish, M., Heyes, C.J., Perrin, D.A., Stone, B.H., Irwin, J.G., 1988. Acid deposition in the United Kingdom: spatial distributions and seasonal variations in 1986. Warren Spring Laboratory, LR 691. Available from AEA Technology, Culham.
2. Campbell, G.W., Devenish, M., Heyes, C.J., Stone, B.H., 1989. Acid deposition in the United Kingdom: spatial distributions and seasonal variations in 1987. Warren Spring Laboratory, LR 735. Available from AEA Technology, Culham.
3. Campbell, G., Stedman, J.R., Irwin, J.G., 1992. Acid deposition in the United Kingdom in 1989. Warren Spring Laboratory, LR 865. Available from AEA Technology, Culham.
4. Cape, J.N., Leith, I.D., 2001. Dry deposition to rain collectors. CEH project C01192, Centre for Ecology and Hydrology, Edinburgh.
5. Department of Environment, Transport and the Regions, 2001. Digest of Environmental Statistics. Data available from: http://www.aeat.co.uk/netcen/airqual/statbase/emissions/emiss1.html.