Columbia subject headings:
Beethoven, Ludwig van, 1770-1827. Chamber music.
Piano music--History and criticism.
Harvard subject headings:
Beethoven, Ludwig van, 1770-1827. Chamber music--Congresses.
Music--Competitions--Italy--Milan.
Piano music--Congresses.
Piano music--History and criticism
Princeton subject headings:
Music--Competitions--Italy--Milan.
Piano music--20th century--History and criticism.