Columbia subject headings:
Music--Austria--Vienna--19th century--Congresses.
Music--Austria--Vienna--20th century--Congresses.
Harvard subject headings:
Music--Austria--Vienna--19th century--Congresses.
Music--Austria--Vienna--20th century--Congresses.
Princeton subject headings:
Music--19th century--History and criticism.
Music--20th century--History and criticism.
Music--Austria--Vienna--Congresses.