Columbia subject headings:
Music--20th century--Historiography--Congresses.
Music--20th century--History and criticism--Congresses.
Music--21st century--Historiography--Congresses.
Music--21st century--History and criticism--Congresses.
Harvard subject headings:
Composition (Music)--History--20th century--Congresses.
Historiography--Congresses
Princeton subject headings: