Columbia subject headings:
Harvard subject headings:
Labor disputes--Belgium--Wallonia--History--20th century.
Labor unions--Belgium--Wallonia--Political activity--History--20th century.
Mouvement populaire wallon.
Wallonia (Belgium)--History--Autonomy and independence movements.
Princeton subject headings:
Labor disputes--Belgium--Wallonia--History--20th century.
Labor unions--Belgium--Wallonia--Political activity--History--20th century.
Mouvement populaire wallon.
Wallonia (Belgium)--History--Autonomy and independence movements.