Columbia subject headings:
Schumann, Clara, 1819-1896--Congresses.
Schumann, Robert, 1810-1856--Congresses.
Harvard subject headings:
Schumann, Clara, 1819-1896--Congresses.
Schumann, Robert, 1810-1856--Congresses.
Princeton subject headings:
Composers--Germany--19th century--Congresses.
Music--Germany--19th century--Congresses.
Schumann, Clara, 1819-1896--Congresses.
Schumann, Robert, 1810-1856--Congresses.