Columbia subject headings:
Beethoven, Ludwig van, 1770-1827--Correspondence.
Composers--Austria--Correspondence.
Harvard subject headings:
Beethoven, Ludwig van, 1770-1827. Correspondence
Composers--Austria--Correspondence
Composers--Germany--Correspondence
Princeton subject headings:
Beethoven, Ludwig van, 1770-1827. Correspondence.
Composers--Austria--Correspondence.