Columbia subject headings:
Art, Abstract--Germany--Tübingen--Catalogs.
Art--Private collections--Germany--Tübingen--Catalogs.
Bretschneider, Kraft--Art collections--Catalogs.
Stiftung Kunst und Recht (Tübingen, Germany)--Catalogs.
Harvard subject headings:
Art, Abstract--Catalogs.
Art, Abstract--Germany--Tübingen--Catalogs.
Art, Modern--20th century--Catalogs
Art--Germany--Tübingen--Catalogs.
Art--Private collections--Germany--Tübingen--Catalogs.
Bretschneider, Kraft--Art collections--Catalogs.
Stiftung Kunst und Recht (Tübingen, Germany)--Catalogs.
Princeton subject headings: