Krishnamurthy, Nirmala, S. Geetha, and Rajammal P. Devadas. 1976. “Biological Utilization of β-Carotene from Amaranth and Leaf Protein in Preschool Children”. The Indian Journal of Nutrition and Dietetics 13 (9):293-95. https://informaticsjournals.co.in/index.php/ijnd/article/view/11647.