1. et al., Toxicity of Inorganic Compounds, Marcel Dekker, New York (1988), provides a timely review.
2. and in et al., Carcinogenic and Mutagenic Metal Compounds, p. 503, Gordon and Breach, New York (1985).
3. and Plastics Additives Handbook, 3rd Ed., p. 297, Oxford, New York (1990).
4. Plastics Additives and Modifiers Handbook, p. 331, Van Nostrand Reinhold, New York (1991).
5. Exxon Technical Report 861T L638 (1986).