Columbia subject headings:
Kaufmann, Friedrich, 1785-1866.
Mechanical musical instruments--19th century.
Music--19th century--Philosophy and aesthetics.
Harvard subject headings:
Kaufmann, Friedrich, 1785-1866.
Mechanical musical instruments--Germany--History--19th century.
Music--19th century--Philosophy and aesthetics
Princeton subject headings:
Kaufmann, Friedrich, 1785-1866.
Mechanical musical instruments--Germany--History--19th century.
Music--19th century--Philosophy and aesthetics.