Columbia subject headings:
Harvard subject headings:
Art, German--20th century--Exhibitions.
Art, Modern--20th century--Germany--Exhibitions.
Blaue Vier (Group of artists)--Exhibitions.
Expressionism (Art)--Germany--Exhibitions
Princeton subject headings:
Art, German--20th century--Exhibitions.
Blaue Vier (Group of artists)--Exhibitions.
Expressionism (Art)--Germany--Exhibitions.