Columbia subject headings:
Harvard subject headings:
Chopin, Frédéric, 1810-1849--Health.
Chopin, Frédéric, 1810-1849--Psychology.
Sand, George, 1804-1876--Psychology.
Princeton subject headings:
Chopin, Frédéric, 1810-1849.
Sand, George, 1804-1876.