Columbia subject headings:
Authors, Austrian--20th century--Correspondence.
Composers--Austria--Correspondence.
Franckenstein, Clemens von, 1875-1942--Correspondence.
Hofmannsthal, Hugo von, 1874-1929--Correspondence.
Harvard subject headings:
Authors, Austrian--20th century--Correspondence
Composers--Germany--Correspondence
Franckenstein, Clemens von, 1875-1942--Correspondence.
Hofmannsthal, Hugo von, 1874-1929--Correspondence.
Princeton subject headings:
Authors, Austrian--20th century--Correspondence.
Composers--Germany--Correspondence.
Franckenstein, Clemens von, 1875-1942--Correspondence.
Hofmannsthal, Hugo von, 1874-1929--Correspondence.