Columbia subject headings:
Art, Modern--20th century--Catalogs.
Art--Germany--Berlin--Catalogs.
Art--Private collections--Germany--Berlin--Catalogs.
Hamburger Bahnhof, Museum für Gegenwartskunst--Catalogs.
Marx, Erich--Art collections--Catalogs.
Harvard subject headings:
Art, Modern--20th century--Exhibitions
Art--Private collections--Germany--Exhibitions
Marx, Erich--Art collections--Exhibitions.
Princeton subject headings:
Art, Modern--20th century--Catalogs.
Art--Germany--Berlin--Catalogs.
Art--Private collections--Germany--Berlin--Catalogs.
Catalogs.
Hamburger Bahnhof, Museum für Gegenwartskunst--Catalogs.
Marx, Erich--Art collections--Catalogs.