Columbia subject headings:
Authors, German--20th century--Correspondence.
Hesse, Hermann, 1877-1962--Correspondence.
Harvard subject headings:
Authors, German--20th century--Correspondence
Hesse, Hermann, 1877-1962.--Correspondence.
Princeton subject headings:
Authors, German--20th century--Correspondence.
Hesse, Hermann, 1877-1962.
Hesse, Hermann, 1877-1962. Correspondence.