Wright M da G, Dutra de Oliveira J E
Child Care Health Dev. 1986 Nov-Dec;12(6):359-68. doi: 10.1111/j.1365-2214.1986.tb00513.x.
One hundred and thirty-three children from birth to 1 year of age were studied to investigate the value of breast milk as a solution to the infant nutrition problem. Fifteen per cent of the children were being fed exclusively breast milk, 44 (44.4%) were fed breast milk plus cow's milk and 40.6% were fed only cow's milk. Thirty-three per cent of the breast fed children, 44.4% of those on mixed feeding and 47% of those on cow's milk alone, were malnourished.