National Academy of Sciencies-National Research Council, Chemicals Used in food Processing(NAS/NRC) Publication 1274, Washington, D.C., 1965).
2.
National Academy of Sciences-National Research Council, Food Additives, Summarized Data for NRC food Additives Surveys(NAS/NRC National Technical Information Service, Washington, D.C., 1981).
3.
ExlerJ., Iron Content of food, Home Economics Research Report No. 45 (U.S. Department of Agriculture, Washington, D.C.1983).
4.
WolfW.R., “Assessment of Inorganic Nutrient intake from Self-Selected Diets”, in BeacherG.R. (Ed.). Beltsville Symposts on Agricultural Research No. 4, Human Nutrition Research(U.S. Department of Agriculture, Beltsville, Maryland, 1981), pp. 175–196.