1. Determination of mercury and methylmercury in fish;Analyst,1977
2. Determination of small amounts of selenium in organic matter;Analyst,1979
3. Official, standardised and recommended methods of analysis,1991
4. Arsenic in Food Regulations (1959) S.I. no. 831, HMSO. London; amended in 1960 by S.I. no. 2261 and in 1973 by S.I. no. 1052.
5. Official methods of Analysis,1990