Older Persons, Selected Health Characteristics, United States, July 1957-June 1959: Selected Statistics Relating to Limitation of Activity and Mobility, Disability Days, Chronic and Acute Conditions, and Physician and Dental Visits for Persons 45 Years and Older
National Health Interview Survey (U.S.)
Jan 1960 · U.S. Department of Health, Education, and Welfare, Public Health Methods