Columbia subject headings:
Harvard subject headings:
Art, Belgian--Belgium--Wallonia--Exhibitions.
Art, Modern--20th century--Belgium--Wallonia--Exhibitions.
Expressionism (Art)--Belgium--Wallonia--Exhibitions.
Princeton subject headings:
Expressionism (Art)--Belgium--Wallonia--Exhibitions.
Painting, Modern--20th century--Belgium--Wallonia--Exhibitions.
Painting, Walloon--Exhibitions.