Columbia subject headings:
Hesse, Hermann, 1877-1962--Exhibitions.
Harvard subject headings:
Hesse, Hermann, 1877-1962--Exhibitions.
Princeton subject headings:
Hesse, Hermann, 1877-1962--Exhibitions.
Hesse, Hermann, 1877-1962--Portraits--Exhibitions.
Hesse, Hermann, 1877-1962.
Watercolor painting, German--Exhibitions.
Watercolor painting--20th century--Exhibitions.