Columbia subject headings:
Authors, German--20th century--Correspondence.
Hesse, Hermann, 1877-1962--Correspondence.
Zweig, Stefan, 1881-1942--Correspondence.
Harvard subject headings:
Hesse, Hermann, 1877-1962. Correspondence.
Zweig, Stefan, 1881-1942--Correspondence.
Princeton subject headings:
Hesse, Hermann, 1877-1962. Correspondence.
Personal correspondence.
Zweig, Stefan, 1881-1942. Correspondence.