1. Recommended Dietary Allowances, Food and Nutrition Board (FNB), Washington DC, USA, 9th edn., 1980, p. 147.
2. Recommended Nutrient Intakes for Canadians, Health and Welfare Canada—Department of Supply and Services, Ottawa, Canada, 1983, p. 136.
3. Dietary Reference Values for Food, Energy an Nutrients for the UK: Report on Health and Social Subjects No. 41, Department of Health, UK, 1991.
4. Liquid Chromatographic Method for Determination of Iodine in Milk: Collaborative Study