Columbia subject headings:
Harvard subject headings:
Liège (Belgium : Province)--Economic conditions.
Liège (Belgium : Province)--Social conditions.
Poor--Belgium--Liège (Province)--History--18th century.
Poor--Belgium--Liège (Province)--History--19th century.
Princeton subject headings:
Liège (Belgium : Province)--Social conditions.
Poor--Belgium--Liège (Province)--History.