1. The Breasts and Breast Feeding;Waller,1957
2. The Letdown Reflex in Human Lactation;Newton;J Pediatr,1948
3. Breastfeeding in Boston;Salber;Pediatrics,1966
4. Decline of Breastfeeding;DeCastro;Clin Pediatr,1968
5. Patterns of Breastfeeding in a Family Health Clinic;Salber;New Engl J Med,1959