Columbia subject headings:
Harvard subject headings:
Authors, Swiss--20th century--Correspondence
Hesse, Hermann, 1877-1962
Morgenthaler, Ernst, 1887-1962.
Morgenthaler, Hans, 1890-1928--Correspondence.
Princeton subject headings:
Authors, Swiss--20th century--Correspondence.
Hesse, Hermann, 1877-1962.
Morgenthaler, Ernst, 1887-1962.
Morgenthaler, Hans, 1890-1928--Correspondence.