Columbia subject headings:
Composers--Germany--Correspondence.
Pianists--Germany--Correspondence.
Schumann, Clara, 1819-1896.
Schumann, Robert, 1810-1856.
Harvard subject headings:
Composers--Germany--Correspondence
Pianists--Germany--Correspondence
Schumann, Clara, 1819-1896
Schumann, Robert, 1810-1856
Princeton subject headings:
Composers--Germany--Correspondence.
Pianists--Germany--Correspondence.
Schumann, Clara, 1819-1896.
Schumann, Robert, 1810-1856.