Columbia subject headings:
Beethoven, Ludwig van, 1770-1827--Criticism and interpretation.
Beethoven, Ludwig van, 1770-1827--Influence.
Schumann, Robert, 1810-1856.
Harvard subject headings:
Beethoven, Ludwig van, 1770-1827--Influence.
Schumann, Robert, 1810-1856.
Princeton subject headings:
Beethoven, Ludwig van, 1770-1827--Influence.
Schumann, Robert, 1810-1856.