Health statistics from U.S. national health survey series. B-36. Chronic conditions causing limitation of activities, United States, July 1959-June 1961, statistics on persons limited in their activity and on persons limited in mobility, due to chronic conditions, by type of condition causing limitation, duration, usual activity, age, and sex, based mi data collected in household interviews during July 1959-June 1961; [prepared by Charles S. Wilder].

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