Columbia subject headings:
Happiness--Europe--Case studies.
Population aging--Europe--Case studies.
Quality of life--Europe--Case studies.
Well-being--Europe--Case studies.
Harvard subject headings:
Happiness--Europe--Case studies.
Population aging--Europe--Case studies.
Quality of life--Europe--Case studies.
Well-being--Europe--Case studies.
Princeton subject headings:
Case studies.
Happiness--Europe--Case studies.
Population aging--Europe--Case studies.
Quality of life--Europe--Case studies.
Well-being--Europe--Case studies.