Columbia subject headings:
Hesse, Hermann, 1877-1962--Friends and associates.
Heuss, Theodor, 1884-1963--Friends and associates.
Harvard subject headings:
Authors, German--20th century--Biography--Exhibitions
Hesse, Hermann, 1877-1962--Friends and associates--Exhibitions.
Heuss, Theodor, 1884-1963--Friends and associates--Exhibitions.
Politicians--Germany--Biography--Exhibitions.
Presidents--Germany--Biography--Exhibitions.
Princeton subject headings:
Hesse, Hermann, 1877-1962.
Heuss, Theodor, 1884-1963.