1. IPCS, Environmental Health Criteria 170, Assessing human health risks of chemicals: derivation of guidance values for health based exposure limits, World Health Organization, Geneva (1994).
2. IPCS, Environmental Health Criteria 188,Nitrogen Oxides, 2nd ed., World Health Organization, Geneva (1997).
3. IPCS,Environmental Health Criteria for Boron, vol.204, World Health Organization, Geneva (1998).
4. WHO, Environmental Health Criteria 70, Principles for the safety assessment of food additives and contaminants in food, World Health Organization, Geneva (1987).
5. WHO,Guidelines for Drinking Water Quality, 2nd ed., vol. 2,Health Criteria and Other Supporting Information, World Health Organization, Geneva (1993).