Columbia subject headings:
Music--Germany--Heidelberg--19th century--History and criticism.
Harvard subject headings:
Hetsch, Ludwig, 1806-1872.
Music festivals--Germany--Heidelberg.
Music--Germany--Heidelberg--19th century--History and criticism.
Princeton subject headings:
Hetsch, Karl Ludwig Friedrich, 1806-1872.
Music festivals--Germany--Heidelberg.
Music--Germany--Heidelberg--19th century--History and criticism.
Musicians--Germany--Biography.