Columbia subject headings:
Art, German--20th century--Catalogs.
Art, German--Catalogs.
Art--Private collections--Germany--Schleswig (Germany and Denmark)--Catalogs.
Horn, Rolf--Art collections--Catalogs.
Schleswig-Holsteinisches Landesmuseum--Catalogs.
Harvard subject headings:
Art, German--Catalogs.
Art, Modern--20th century--Germany--Catalogs.
Art--Private collections--Germany--Schleswig--Catalogs.
Expressionism (Art)--Germany--Catalogs
Horn, Rolf--Art collections--Catalogs.
Schleswig-Holsteinisches Landesmuseum--Catalogs.
Princeton subject headings:
Art, German--Private collections--Germany--Schleswig--Catalogs.
Art, Modern--20th century--Private collections--Germany--Schleswig--Catalogs.
Expressionism (Art)--Private collections--Germany--Schleswig--Catalog.
Horn, Rolf--Art collections--Catalogs.
Schleswig-Holsteinisches Landesmuseum--Catalogs.