Columbia subject headings:
Harvard subject headings:
Poor--Europe--History--Congresses.
Poor--Europe--Social conditions--Congresses.
Poor--Germany--History--19th century--Congresses.
Poor--Germany--History--20th century--Congresses.
Poor--Great Britain--History--19th century--Congresses.
Poor--Great Britain--History--20th century--Congresses.
Poor--Ireland--History--19th century--Congresses.
Poor--Ireland--History--20th century--Congresses.
Welfare state--Europe--History--Congresses.
Princeton subject headings:
Poor--Europe--Social conditions--Congresses.
Poor--Germany--History--19th century--Congresses.
Poor--Germany--History--20th century--Congresses.
Poor--Great Britain--History--19th century--Congresses.
Poor--Great Britain--History--20th century--Congresses.
Poor--Ireland--History--19th century--Congresses.
Poor--Ireland--History--20th century--Congresses.