Columbia subject headings:
Authors, Austrian--20th century--Correspondence.
Degenfeld-Schonburg, Ottonie, Gräfin von, 1882-1970--Correspondence.
Hofmannsthal, Hugo von, 1874-1929--Correspondence.
Nobility--Austria--Correspondence.
Harvard subject headings:
Authors, Austrian--20th century--Correspondence
Degenfeld-Schonburg, Ottonie, Gräfin von, 1882-1970--Correspondence.
Hofmannsthal, Hugo von, 1874-1929--Correspondence.
Wendelstadt, Julie, Freifrau von, 1871-1942--Correspondence.
Princeton subject headings:
Authors, Austrian--20th century--Correspondence.
Degenfeld-Schonburg, Ottonie, Gräfin von, 1882-1970--Correspondence.
Hofmannsthal, Hugo von, 1874-1929--Correspondence.
Nobility--Austria--Correspondence.