Vital and health statistics: Series 10, Data from National Health Survey. 4. Disability days, United States, July 1961-June 1962, statistics on volume of restricted-activity days, bed-disability days, work-loss days, aud school-loss days, by ace, sex, fumily income, residence, usual activity status, occupation, and industry, based on data collected in household interviews during period July 1961-June 1902; [prepared by Charles S. Wilder).

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