Devadas, R. P., N. K. Murthy, and K. S. Sarojini. “Evaluation of Calcium and Iron Supplements to Opaque-2 and Ordinary Maize Diets on Preschool Children”. The Indian Journal of Nutrition and Dietetics, vol. 14, no. 4, Apr. 1977, pp. 87-91, http://www.informaticsjournals.com/index.php/ijnd/article/view/11930.