Columbia subject headings:
Old age assistance--Europe.
Older people--Europe--Economic conditions.
Older people--Europe--Social conditions.
Older people--Europe.
Harvard subject headings:
Old age assistance--Europe.
Older people--Europe--Economic conditions.
Older people--Europe--Social conditions.
Older people--Europe.
Princeton subject headings:
Older people--Employment--Organization for Economic Cooperation and Development countries.
Older people--Organization for Economic Cooperation and Development countries--Economic conditions.
Older people--Organization for Economic Cooperation and Development countries--Social conditions.
Retirement--Organization for Economic Cooperation and Development countries.