Columbia subject headings:
Art, Abstract--Germany--Exhibitions.
Art, German--20th century--Exhibitions.
Art, German--21st century--Exhibitions.
Harvard subject headings:
Art, Abstract--Germany--Exhibitions
Art, German--20th century--Exhibitions.
Art, German--21st century--Exhibitions.
Princeton subject headings:
Art, Abstract--Germany--Exhibitions.
Art, German--20th century--Exhibitions.
Art, German--21st century--Exhibitions.