1. Health U.S.A., 1984;U.S. Department of HHS;Publication No. (PHS) 83-1232,1984
2. Demographic aspects of aging and the older population in the United States;U.S. Bureau of the Census,1978
3. Self assessment of physical function: white and black elderly of the United States;Shanas,1980
4. Hendricks J, Hendricks CD: Aging in Mass Society. Cambridge Mass.: Winthrop.
5. Aging, the Ethnic Factor;Gelfand;Little Brown Series on Gerontology,1982