Rockville, Md. : U.S. Department of Health, Education and Welfare, Public Health Service, Health Services and Mental Health Administration, National Center for Health Statistics, 1972
"Statistics on the hospital and convalescent experience, i.e., days confined to the house or days confined to the bed, of persons 55 years and over, by selected demographic characteristics. Based on data collected in household interviews during the period July 1966-June 1967."