Columbia subject headings:
Harvard subject headings:
Altruism--Congresses.
Public welfare--Germany (West)--Congresses.
Public welfare--Germany--Congresses.
Social control--Congresses.
Social service--Germany (West)--Congresses.
Social service--Germany--Congresses.
Princeton subject headings:
Altruism--Congresses.
Hotlines (Counseling)--Congresses.
Psychotherapists--Congresses.
Self-help groups--Congresses.
Social case work--Congresses.
Social control--Congresses.