Watts, A. (1970). The Individual as Man/World. In Politics and Environment , Ed. W. Anderson, Goodyear Publishing Co., Pacific Palisades, 354.
2.
Commoner, B. (1970). The Ecological Facts of Life. In The Ecological Conscience, Ed. R. Disch, Spectrum, Englewood Cliffs, 2.
3.
Taylor, G.R. (1970). The Doomsday Book, Thames and Hudson, London.
4.
Nicholson, M. (1970). The Environmental Revolution, Hodder & Stoughton, London.
5.
Goldsmith, E. et al. (1972). A Blueprint for Survival, The Ecologist, 2, 1.
6.
List of Approved Products and their Uses for Farmers and Growers ( 1972), Ministry of Agriculture, Fisheries and Food , H.M.S.O., London.
7.
Lawther, P.J. (1959). The Effects of Atmospheric Pollution on Man. In Effects of Pollution on Living Material. Ed. W. B. Yapp, Institute of Biology, London.
8.
Newell, G.F. (1959). Pollution and the Abundance of Animals in Estuaries, ibid.
9.
Restoring the Quality of Our Environment ( 1965). Report of the Environmental Pollution Panel Presidents' Science Advisory Committee, The White House, Washington, D.C.
10.
Lord Kennet, (1970). Controlling our Environment, Fabian Research Series 283. Fabian Society, London.
11.
Lead: Airborne Lead in Perspective (1972). Report of the Committee on Biologic Effects of Atmospheric Pollutants , National Academy of Sciences, Washington, D.C.
12.
Murozumi, M. , Chow, T.J., and Patterson , C. (1969). Chemical Concentrations of Pollutant Lead Aerosols, Terrestrial Dusts and Sea Salts in Greenland and Antarctic Snow Strata, Geochemica et Cosmochimica Acta, 33, 1247.
13.
Rühling, A. , and Tyler, G. (1968). An Ecological Approach to the Lead Problem, Bot. Notiser, 121, 21.
14.
Report on Lead: Revised Recommendations for Limits for Lead Content of Food (1954). Ministry of Food, H.M.S.O., London.
15.
Stopps, G.J. et al (1966). Lead Research: Current Medical Developments: Trans. 31st Annual Meeting of the Industrial Hygiene Foundation of America, Inc. Trans. Bull, 40, 73.
16.
Further Review of Certain Persistent Organochlorine Pesticides Used in Great Britain (1969). Dept. of Education and Science, H.M.S.O., London.
17.
Report of the Secretary's Commission on Pesticides and their Relationship to Environmental Health (1969). U.S. Dept. of Health, Education and Welfare, Washington, D.C.