Columbia subject headings:
Gerstl, Richard, 1883-1908--Exhibitions.
Kokoschka, Oskar, 1886-1980--Exhibitions.
Harvard subject headings:
Gerstl, Richard, 1883-1908--Exhibitions.
Kokoschka, Oskar, 1886-1980--Exhibitions.
Princeton subject headings:
Gerstl, Richard, 1883-1908--Exhibitions.
Kokoschka, Oskar, 1886---Exhibitions.