Columbia subject headings:
Art, European--19th century--Catalogs.
Art, European--20th century--Catalogs.
Art, European--Catalogs.
Art--Private collections--Switzerland--Basel--Catalogs.
Im Oberstag, Karl, 1883-1969--Art collections--Catalogs.
Im Obersteg, Jürg--Art collections--Catalogs.
Harvard subject headings:
Im Obersteg, Jürg, 1914-1983--Art collections--Catalogs.
Im Obersteg, Karl, 1883-1969--Art collections--Catalogs.
Princeton subject headings:
Art, European--20th century--Catalogs.
Art, European--Catalogs.
Art, Modern--19th century--Europe--Catalogs.
Art--Private collections--Switzerland--Basel--Catalogs.
Catalogs.
Im Oberstag, Karl, 1883-1969--Art collections--Catalogs.
Im Obersteg, Jürg--Art collections--Catalogs.