1. 1. Mackintosh DR: Systems of Health Care. Boulder. CO. Westview Press. 1978.
2. 2. Fowles DG: A Profile of older Americans1985. Program Resources Dept American Association of Retired Persons and the Adminstration of Aging US Depi of Health and Human Services.
3. 3. Collins JG: Prevalence of Selected Chronic Conditions. Vital and Health Statistics Series 10 No 155 National Center for Health Statistics. Hyattsville Maryland 1986.
4. 4. Shock N: The physiology of aging. Scientific American 1962; 206(!):IOO-110.
5. 5. Campbell LJ Cole KD: Geriatric Assessment Teams in Rubenslein LZ Campbell LJ. Kane RL (eds): Clinics in Geriatric Medicine. Philadelphia WB Saunders 1987. vol 33. pp 99-110.