1. Bonner, F. W., & Bridges, J. W. (1983). Toxicological properties of trace elements. In J. Rose, Trace elements in health (pp. 1–20). London: Butterworth.
2. Browning, E. M. (1969). Toxicity of Industrial Metals (2nd ed.) London: Butterworth.
3. Effect of industrial pollution on seafood content and dietary intake of total and methylmercury;Buzina;Science of the Total Environment,1989
4. CIFA (Committee for Inland Fisheries of Africa) (1992). Report of the Third Session of the Working Party on Pollution and Fisheries, FAO Fisheries Report No 471, Food and Agriculture Organisation of the United Nations, Rome.
5. DHSS (Department of Health and Social Security) (1980). Lead and health: the report of a DHSS working party on lead in the environment. London: HMSO.