Chandrasekhar, U. “Evaluation of Certain Food Additives and the Contaminants Mercury. Lead and Cadmium Sixteenth Report of the Joint FAO/Who”. The Indian Journal of Nutrition and Dietetics, vol. 10, no. 6, Nov. 1973, pp. 324-5, http://www.informaticsjournals.com/index.php/ijnd/article/view/10763.