1. R. Apple (1987 ). Mothers and medicine . A social history of infant feeding. 1890-1950 (pp.23 -35 ). Madison: University of Wisconsin Press.
2. S. J. Baker (1925 ). Child hygiene (pp.190 -225 ). New York: Harper & Brothers.
3. S. J. Baker (1939 ). Fighting for life (pp.18 -139 ). New York: Macmillan.