1. Healthy People,1979
2. Healthy People 2000,1991
3. Healthy People 2010 (Conference Edition, in Two Volumes). Washington DC: US Department of Health and Human Services, 2000. Available at: http://www.health.gov/healthypeople
4. Recent declines in breastfeeding in the United States, 1984 through 1989;Ryan;Pediatrics.,1991
5. Abbott Laboratories. Mothers Survey. Ross Products Division, 2001.