Columbia subject headings:
Age distribution (Demography)--United States.
Older people--Family relationships--United States.
Older people--Medical care--United States.
Older people--United States--Economic conditions.
Older people--United States--Social conditions.
Harvard subject headings:
Age distribution (Demography)--United States.
Older people--Family relationships--United States.
Older people--Medical care--United States.
Older people--United States--Economic conditions.
Older people--United States--Family relationships.
Older people--United States--Social conditions.
Princeton subject headings:
Age distribution (Demography)--United States.
Older people--Family relationships--United States.
Older people--Medical care--United States.
Older people--United States--Economic conditions.
Older people--United States--Social conditions.