Columbia subject headings:
Industrial relations--Europe--Case studies.
Social security--Europe--Case studies.
Wages--Europe--Case studies.
Working class--Europe--Case studies.
Harvard subject headings:
Industrial relations--Europe--Case studies.
Labor--Europe--Case studies.
Social security--Europe--Case studies.
Wages--Europe--Case studies.
Working class--Europe--Case studies.
Princeton subject headings:
Industrial relations--Europe--Case studies.
Industrial relations--Europe.
Social security--Europe--Case studies.
Social security--Europe.
Wages--Europe--Case studies.
Wages--Europe.
Working class--Europe--Case studies.
Working class--Europe.