Columbia subject headings:
Biedermeier--Congresses.
Church music--Austria--Congresses.
Music--19th century--History and criticism--Congresses.
Harvard subject headings:
Biedermeier--Congresses.
Church music--Austria--Congresses.
Music--19th century--History and criticism--Congresses.
Princeton subject headings:
Biedermeier--Congresses.
Church music--Austria--Congresses.
Music--19th century--History and criticism--Congresses.