Columbia subject headings:
Authors, German--20th century--Correspondence.
Jahnn, Hans Henny, 1894-1959--Correspondence.
Harvard subject headings:
Authors, German--20th century--Correspondence
Jahn, Hans Henny, 1894-1959--Correspondence.
Princeton subject headings:
Authors, German--20th century--Correspondence.
Jahnn, Hans Henny, 1894-1959--Correspondence.