Columbia subject headings:
Harvard subject headings:
Luxembourg--Social conditions--19th century--Exhibitions.
Luxembourg--Social conditions--20th century--Exhibitions.
Poor--Luxembourg--History--Exhibitions.
Poverty--Government policy--Luxembourg--Exhibitions.
Poverty--Luxembourg--History--19th century--Exhibitions.
Poverty--Luxembourg--History--20th century--Exhibitions.
Poverty--Luxembourg--History--Exhibitions.
Princeton subject headings:
Poor--Luxembourg--History--Exhibitions.
Poverty--Luxembourg--History--Exhibitions.