＜図書＞
Disability among persons in the labor force by employment status, United States, July 1961-June 1962 : selected statistics on limitation of activitiy and days of restricted activity and bed disability for the total labor force, by age, sex, family income, employment status, occupation, and industry : based on data collected in household interviews during July 1961-June 1962
(Public Health Service publication ; no. 1000 . Vital and health statistics ; ser. 10 . data from the National Health Survey ; no. 7)