Columbia subject headings:
Hesse, Hermann, 1877-1962--Exhibitions.
Hesse, Hermann, 1877-1962--Friends and associates--Exhibitions.
Widman, Fritz, 1869-1937--Exhibitions.
Widman, Gret, 1875-1931--Exhibitions.
Harvard subject headings:
Hesse, Hermann, 1877-1962--Exhibitions.
Hesse, Hermann, 1877-1962--Friends and associates--Exhibitions.
Widman, Fritz, 1869-1937--Exhibitions.
Widman, Gret, 1875-1931--Exhibitions.
Princeton subject headings:
Hesse, Hermann, 1877-1962--Exhibitions.
Hesse, Hermann, 1877-1962--Friends and associates--Exhibitions.
Widmann, Fritz, 1869-1937--Exhibitions.
Widmann, Gret, 1875-1931--Exhibitions.