Columbia subject headings:
Art, Modern--20th century--Exhibitions.
Arts, Modern--20th century--Exhibitions.
National-Galerie (Germany)--Exhibitions.
Harvard subject headings:
Art, German--20th century--Exhibitions.
Neue Nationalgalerie (Germany)
Neue Nationalgalerie (Germany)--Art collections--Exhibitions.
Princeton subject headings:
Art, German--20th century--Exhibitions.
Neue Nationalgalerie (Germany)--Art collections--Exhibitions.