Columbia subject headings:
Harvard subject headings:
Art, German--Exhibitions.
Art, Modern--19th century--Germany--Exhibitions.
Art, Modern--20th century--Germany--Exhibitions.
Kampmann, Gustav, 1859-1917--Exhibitions.
Schönleber, Gustav, 1851-1917--Exhibitions.
Princeton subject headings:
Kampmann, Gustav, 1859-1917--Exhibitions.
Schönleber, Gustav, 1851-1917--Exhibitions.