Columbia subject headings:
Chopin, Frédéric, 1810-1849--Correspondence.
Müller, Friederike, 1816-1895--Correspondence.
Pianists--Correspondence.
Harvard subject headings:
Chopin, Frédéric, 1810-1849--Knowledge--Music--Sources.
Music--Instruction and study--France--Paris--History--Sources.
Müller, Friederike, 1816-1895--Correspondence.
Müller, Friederike, 1816-1895--Knowledge and learning.
Pianists--France--Paris--Correspondence.
Princeton subject headings:
Chopin, Frédéric, 1810-1849--Knowledge--Music--Sources.
Music--Instruction and study--France--Paris--History--Sources.
Müller, Friederike, 1816-1895--Correspondence.
Müller, Friederike, 1816-1895--Knowledge and learning.
Pianists--France--Paris--Correspondence.