1. Who’s Minding the Kids? Child Care Arrangements: Spring 1997;Smith,2002
2. Healthy People 2010: Understanding and Improving Health,2000
3. Social and economic causes of cancer;Harris,1989
4. Healthy People 2000: National Health Promotion and Disease Prevention Objectives,1991
5. Child care arrangements for children under five: variation across states;Capizzano,2000