Columbia subject headings:
Authors, Austrian--20th century--Correspondence.
Diplomats--Austria--Correspondence.
Hofmannsthal, Hugo von, 1874-1929--Correspondence.
Zifferer, Paul, 1879-1929--Correspondence.
Harvard subject headings:
Authors, Austrian--20th century--Correspondence
Diplomats--Austria--Correspondence.
Hofmannsthal, Hugo von, 1874-1929--Correspondence.
Zifferer, Paul, 1879-1929--Correspondence.
Princeton subject headings:
Authors, Austrian--20th century--Correspondence.
Diplomats--Austria--Correspondence.
Hofmannsthal, Hugo von, 1874-1929--Correspondence.
Zifferer, Paul, 1879-1929--Correspondence.