1. An Assessment of Mercury in the Environment (National Research Council, National Academy of Sciences, Washington DC, 1978).
2. Armstrong, F. A. J. & Scott, D. P. J. Fish. Res. Board Can. 36, 670 (1979).
3. Davies, I. M., Graham, W. C. & Pirie, J. M. Mar. Chem. 7, 111 (1979).
4. Egawa, H. & Tajima, S. in Proc. 2nd US Japan Experts Meet., Tokyo (1976).
5. Bull. mar. Sci. 27, No 1 (1977).