M, H.1886Comp. Rend. , 102, 1534; Gmelins Handbuct der anorganischem Chemie, System 5, 8th ed. Deutsche Chemis
2.
che Gesellschaft, Verlag Chemie, Berlin, Germany. 1926 pp. 4-16.
3.
Longwell, J. (1957) Royal Soc. Health J., 77, 361-374.
4.
Report of the Sub-Committee on the Disposal of Sewage Sludge to Land. 1981Department of the Environment , Standing Technica Committee Report No. 2.
5.
Read, J.I. and Collins, R. (1982) Estimation of Total Fluoride in Foods. J. Association of Public Analysts , 20(4), 109-115.
6.
Hopkin, S.M. and Ellis, J.C. (1980) Drinking Water Consump tion in Great Britain. Water Research Centre Technical Report TR 137.
7.
Burt, B.A., Jackson, D., Jenkins , G.N., Murray, J.J. and Young, M.A. (1973). Fluoride: a critique of an Article in THE Sunday Times. British Dental Journal , 135 , 543-546.
8.
Dowell, T.B. and Joyston-Bechal , S. (1981). Fluoride supple ments—age related dosages. British Dental Journal, 150, 273-275
9.
Sherlock, J.C.Lindsay, D.G., Hislop , J.S., Evans, W.H. and Collier, T.R. (1982), Duplication Diet Study on Mercury Intake by Fish Consumers in the United Kingdom. Archives of Environmental Health , 37, (5), 271-278.