Columbia subject headings:
Harvard subject headings:
Public welfare--Congresses
Public welfare--Germany--Congresses.
Social justice--Congresses
Social justice--Germany--Congresses.
Welfare state--Congresses.
Welfare state--Germany--Congresses.
Princeton subject headings:
Public welfare--Congresses.
Social justice--Congresses.
Social justice--Germany--Congresses.
Welfare state--Congresses.