Columbia subject headings:
Harvard subject headings:
Art, German--20th century--Exhibitions
Art, Modern--20th century--Exhibitions
Painting, German--20th century--Exhibitions
Painting, Modern--20th century--Exhibitions
Photography, Artistic--20th century--Exhibitions.
Photography--Germany--History--20th century--Exhibitions.
Portrait painting--History--20th century--Exhibitions.
Portrait photography--History--20th century--Exhibitions.
Princeton subject headings:
Art, German--20th century--Exhibitions.
Neue Sachlichkeit (Art)--Exhibitions.