Columbia subject headings:
Beethoven, Ludwig van, 1770-1827.
Internationales Beethovenfest Bonn--History.
Harvard subject headings:
Beethoven, Ludwig van, 1770-1827--Performances.
Concerts--Germany--Bonn--History.
Internationales Beethovenfest Bonn--History.
Music festivals--Germany--Bonn--History.
Princeton subject headings:
Beethoven, Ludwig van, 1770-1827.
Internationales Beethovenfest Bonn--History.