Columbia subject headings:
Harvard subject headings:
Ability, Influence of age on--Congresses.
Life span, Productive--Congresses.
Old age assistance--United States--Congresses.
Older people--Congresses.
Older people--Employment--Congresses.
Princeton subject headings:
Ability, Influence of age on--Congresses.
Life span, Productive--Congresses.
Old age assistance--United States--Congresses.
Older people--Congresses.
Older people--Employment--Congresses.