Acute conditions, incidence, and associated disability, United States, July 1971-June 1972 /
Wilder, Charles S.
Rockville, Md. : National Center for Health Statistics, 
1974.
"This report presents statistics on the incidence of acute conditions and the associated days of restricted activity, bed disability, and time lost from work and school, by age, sex, calender quarter, residence, and geographic region."