1. Food and Drug Administration Compliance Program Guidance Manual 7320.08. Total Diet Studies-Adult Washington D.C. 1974.
2. Surveys of mercury levels in fish and other foods;Simpson R.E.;Pestic. Monit. J.,1974
3. Food Exposures to Lead
4. 16th Report on Joint FAO/WHO Expert Committee on Food Additives Geneva 1972.
5. National Academy of Sciences-National Research Council. Recommended Dietary Allowances. 8th ed. Washington D.C. 1974.