'The possible Effects of Human Activity on the World Climate ', J. S. Sawyer—Paper to the 1971 Annual Conference of the National Society for Clean Air.
2.
The Royal Commission on Environmental Pollution—First Report. Cmnd 4585, H.M.S.O., 1971.
3.
'The Toxic Metals', AnthonyTucker, Earth Island Ltd.1972.
4.
'Water Quality Relationships in the River System', paper presented by J. H. Garland and I. C. Hart on the Trent Research Programme at a Symposium of the Institute of Water Pollution Control, April 1971.
5.
104th Annual Report of the Chief Alkali Inspector, for 1967, H.M.S.O.
6.
'Air Pollution in the United Kingdom—Present Position and Recent National and Regional Trends', Warren Spring Laboratory . Report by S. R. Craxford, M.-L. P. M. Weatherley, and B. D. Gooriah, 1970.
