1. A National Agenda for Research on Aging
2. Berg RL, Casells JS (eds): The Second Fifty Years: Promoting Health and Preventing Disability, Washington, DC, National Academy Press, 1990
3. Persons With Chronic Conditions
4. US Department of Health and Human Services: Physical Activity and Health: a Report of the Surgeon General, US Department of Health and Human Services, Atlanta, DHHS, Centers for Disease Control and Prevention, National Center for Chronic Disease Prevention and Health Promotion, 1996
5. Physical Activity and Public Health